International Covenant on Civil and Political Rights

Adopted and opened for signature, ratification and accession by General Assembly resolution 2200A (XXI) of 16 December 1966
entry into force 23 March 1976, in accordance with Article 49

Preamble

The States Parties to the present Covenant,

Considering that, in accordance with the principles proclaimed in the Charter of the United Nations, recognition of the inherent dignity and of the equal and inalienable rights of all members of the human family is the foundation of freedom, justice and peace in the world,

Recognizing that these rights derive from the inherent dignity of the human person,

Recognizing that, in accordance with the Universal Declaration of Human Rights, the ideal of free human beings enjoying civil and political freedom and freedom from fear and want can only be achieved if conditions are created whereby everyone may enjoy his civil and political rights, as well as his economic, social and cultural rights,

Considering the obligation of States under the Charter of the United Nations to promote universal respect for, and observance of, human rights and freedoms,

Realizing that the individual, having duties to other individuals and to the community to which he belongs, is under a responsibility to strive for the promotion and observance of the rights recognized in the present Covenant,

Agree upon the following articles:

PART I

Article 1

1. All peoples have the right of self-determination. By virtue of that right they freely determine their political status and freely pursue their economic, social and cultural development.

2. All peoples may, for their own ends, freely dispose of their natural wealth and resources without prejudice to any obligations arising out of international economic co-operation, based upon the principle of mutual benefit, and international law. In no case may a people be deprived of its own means of subsistence.

3. The States Parties to the present Covenant, including those having responsibility for the administration of Non-Self-Governing and Trust Territories, shall promote the realization of the right of self-determination, and shall respect that right, in conformity with the provisions of the Charter of the United Nations.

PART II

Article 2

1. Each State Party to the present Covenant undertakes to respect and to ensure to all individuals within its territory and subject to its jurisdiction the rights recognized in the present Covenant, without distinction of any kind, such as race, colour, sex, language, religion, political or other opinion, national or social origin, property, birth or other status.

2. Where not already provided for by existing legislative or other measures, each State Party to the present Covenant undertakes to take the necessary steps, in accordance with its constitutional processes and with the provisions of the present Covenant, to adopt such laws or other measures as may be necessary to give effect to the rights recognized in the present Covenant.

3. Each State Party to the present Covenant undertakes:

(a) To ensure that any person whose rights or freedoms as herein recognized are violated shall have an effective remedy, notwithstanding that the violation has been committed by persons acting in an official capacity;

(b) To ensure that any person claiming such a remedy shall have his right thereto determined by competent judicial, administrative or legislative authorities, or by any other competent authority provided for by the legal system of the State, and to develop the possibilities of judicial remedy;

(c) To ensure that the competent authorities shall enforce such remedies when granted.

Article 3

The States Parties to the present Covenant undertake to ensure the equal right of men and women to the enjoyment of all civil and political rights set forth in the present Covenant.

Article 4

1 . In time of public emergency which threatens the life of the nation and the existence of which is officially proclaimed, the States Parties to the present Covenant may take measures derogating from their obligations under the present Covenant to the extent strictly required by the exigencies of the situation, provided that such measures are not inconsistent with their other obligations under international law and do not involve discrimination solely on the ground of race, colour, sex, language, religion or social origin.

2. No derogation from articles 6, 7, 8 (paragraphs I and 2), 11, 15, 16 and 18 may be made under this provision.

3. Any State Party to the present Covenant availing itself of the right of derogation shall immediately inform the other States Parties to the present Covenant, through the intermediary of the Secretary-General of the United Nations, of the provisions from which it has derogated and of the reasons by which it was actuated. A further communication shall be made, through the same intermediary, on the date on which it terminates such derogation.

Article 5

1. Nothing in the present Covenant may be interpreted as implying for any State, group or person any right to engage in any activity or perform any act aimed at the destruction of any of the rights and freedoms recognized herein or at their limitation to a greater extent than is provided for in the present Covenant.

2. There shall be no restriction upon or derogation from any of the fundamental human rights recognized or existing in any State Party to the present Covenant pursuant to law, conventions, regulations or custom on the pretext that the present Covenant does not recognize such rights or that it recognizes them to a lesser extent.

PART III

Article 6

1. Every human being has the inherent right to life. This right shall be protected by law. No one shall be arbitrarily deprived of his life.

2. In countries which have not abolished the death penalty, sentence of death may be imposed only for the most serious crimes in accordance with the law in force at the time of the commission of the crime and not contrary to the provisions of the present Covenant and to the Convention on the Prevention and Punishment of the Crime of Genocide. This penalty can only be carried out pursuant to a final judgement rendered by a competent court.

3. When deprivation of life constitutes the crime of genocide, it is understood that nothing in this article shall authorize any State Party to the present Covenant to derogate in any way from any obligation assumed under the provisions of the Convention on the Prevention and Punishment of the Crime of Genocide.

4. Anyone sentenced to death shall have the right to seek pardon or commutation of the sentence. Amnesty, pardon or commutation of the sentence of death may be granted in all cases.

5. Sentence of death shall not be imposed for crimes committed by persons below eighteen years of age and shall not be carried out on pregnant women.

6. Nothing in this article shall be invoked to delay or to prevent the abolition of capital punishment by any State Party to the present Covenant.

Article 7

No one shall be subjected to torture or to cruel, inhuman or degrading treatment or punishment. In particular, no one shall be subjected without his free consent to medical or scientific experimentation.

Article 8

1. No one shall be held in slavery; slavery and the slave-trade in all their forms shall be prohibited.

2. No one shall be held in servitude.

3.

(a) No one shall be required to perform forced or compulsory labour;

(b) Paragraph 3 (a) shall not be held to preclude, in countries where imprisonment with hard labour may be imposed as a punishment for a crime, the performance of hard labour in pursuance of a sentence to such punishment by a competent court;

(c) For the purpose of this paragraph the term "forced or compulsory labour" shall not include:

(i) Any work or service, not referred to in subparagraph (b), normally required of a person who is under detention in consequence of a lawful order of a court, or of a person during conditional release from such detention;

(ii) Any service of a military character and, in countries where conscientious objection is recognized, any national service required by law of conscientious objectors;

(iii) Any service exacted in cases of emergency or calamity threatening the life or well-being of the community;

(iv) Any work or service which forms part of normal civil obligations.

Article 9

1. Everyone has the right to liberty and security of person. No one shall be subjected to arbitrary arrest or detention. No one shall be deprived of his liberty except on such grounds and in accordance with such procedure as are established by law.

2. Anyone who is arrested shall be informed, at the time of arrest, of the reasons for his arrest and shall be promptly informed of any charges against him.

3. Anyone arrested or detained on a criminal charge shall be brought promptly before a judge or other officer authorized by law to exercise judicial power and shall be entitled to trial within a reasonable time or to release. It shall not be the general rule that persons awaiting trial shall be detained in custody, but release may be subject to guarantees to appear for trial, at any other stage of the judicial proceedings, and, should occasion arise, for execution of the judgement.

4. Anyone who is deprived of his liberty by arrest or detention shall be entitled to take proceedings before a court, in order that that court may decide without delay on the lawfulness of his detention and order his release if the detention is not lawful.

5. Anyone who has been the victim of unlawful arrest or detention shall have an enforceable right to compensation.

Article 10

1. All persons deprived of their liberty shall be treated with humanity and with respect for the inherent dignity of the human person.

2.

(a) Accused persons shall, save in exceptional circumstances, be segregated from convicted persons and shall be subject to separate treatment appropriate to their status as unconvicted persons;

(b) Accused juvenile persons shall be separated from adults and brought as speedily as possible for adjudication.

3. The penitentiary system shall comprise treatment of prisoners the essential aim of which shall be their reformation and social rehabilitation. Juvenile offenders shall be segregated from adults and be accorded treatment appropriate to their age and legal status.

Article 11

No one shall be imprisoned merely on the ground of inability to fulfil a contractual obligation.

Article 12

1. Everyone lawfully within the territory of a State shall, within that territory, have the right to liberty of movement and freedom to choose his residence.

2. Everyone shall be free to leave any country, including his own.

3. The above-mentioned rights shall not be subject to any restrictions except those which are provided by law, are necessary to protect national security, public order (ordre public), public health or morals or the rights and freedoms of others, and are consistent with the other rights recognized in the present Covenant.

4. No one shall be arbitrarily deprived of the right to enter his own country.

Article 13

An alien lawfully in the territory of a State Party to the present Covenant may be expelled therefrom only in pursuance of a decision reached in accordance with law and shall, except where compelling reasons of national security otherwise require, be allowed to submit the reasons against his expulsion and to have his case reviewed by, and be represented for the purpose before, the competent authority or a person or persons especially designated by the competent authority.

Article 14

1. All persons shall be equal before the courts and tribunals. In the determination of any criminal charge against him, or of his rights and obligations in a suit at law, everyone shall be entitled to a fair and public hearing by a competent, independent and impartial tribunal established by law. The press and the public may be excluded from all or part of a trial for reasons of morals, public order (ordre public) or national security in a democratic society, or when the interest of the private lives of the parties so requires, or to the extent strictly necessary in the opinion of the court in special circumstances where publicity would prejudice the interests of justice; but any judgement rendered in a criminal case or in a suit at law shall be made public except where the interest of juvenile persons otherwise requires or the proceedings concern matrimonial disputes or the guardianship of children.

2. Everyone charged with a criminal offence shall have the right to be presumed innocent until proved guilty according to law.

3. In the determination of any criminal charge against him, everyone shall be entitled to the following minimum guarantees, in full equality: (a) To be informed promptly and in detail in a language which he understands of the nature and cause of the charge against him;

(b) To have adequate time and facilities for the preparation of his defence and to communicate with counsel of his own choosing;

(c) To be tried without undue delay;

(d) To be tried in his presence, and to defend himself in person or through legal assistance of his own choosing; to be informed, if he does not have legal assistance, of this right; and to have legal assistance assigned to him, in any case where the interests of justice so require, and without payment by him in any such case if he does not have sufficient means to pay for it;

(e) To examine, or have examined, the witnesses against him and to obtain the attendance and examination of witnesses on his behalf under the same conditions as witnesses against him;

(f) To have the free assistance of an interpreter if he cannot understand or speak the language used in court;

(g) Not to be compelled to testify against himself or to confess guilt.

4. In the case of juvenile persons, the procedure shall be such as will take account of their age and the desirability of promoting their rehabilitation.

5. Everyone convicted of a crime shall have the right to his conviction and sentence being reviewed by a higher tribunal according to law.

6. When a person has by a final decision been convicted of a criminal offence and when subsequently his conviction has been reversed or he has been pardoned on the ground that a new or newly discovered fact shows conclusively that there has been a miscarriage of justice, the person who has suffered punishment as a result of such conviction shall be compensated according to law, unless it is proved that the non-disclosure of the unknown fact in time is wholly or partly attributable to him.

7. No one shall be liable to be tried or punished again for an offence for which he has already been finally convicted or acquitted in accordance with the law and penal procedure of each country.

Article 15

1 . No one shall be held guilty of any criminal offence on account of any act or omission which did not constitute a criminal offence, under national or international law, at the time when it was committed. Nor shall a heavier penalty be imposed than the one that was applicable at the time when the criminal offence was committed. If, subsequent to the commission of the offence, provision is made by law for the imposition of the lighter penalty, the offender shall benefit thereby.

2. Nothing in this article shall prejudice the trial and punishment of any person for any act or omission which, at the time when it was committed, was criminal according to the general principles of law recognized by the community of nations.

Article 16

Everyone shall have the right to recognition everywhere as a person before the law.

Article 17

1. No one shall be subjected to arbitrary or unlawful interference with his privacy, family, home or correspondence, nor to unlawful attacks on his honour and reputation.

2. Everyone has the right to the protection of the law against such interference or attacks.

Article 18

1. Everyone shall have the right to freedom of thought, conscience and religion. This right shall include freedom to have or to adopt a religion or belief of his choice, and freedom, either individually or in community with others and in public or private, to manifest his religion or belief in worship, observance, practice and teaching.

2. No one shall be subject to coercion which would impair his freedom to have or to adopt a religion or belief of his choice.

3. Freedom to manifest one's religion or beliefs may be subject only to such limitations as are prescribed by law and are necessary to protect public safety, order, health, or morals or the fundamental rights and freedoms of others.

4. The States Parties to the present Covenant undertake to have respect for the liberty of parents and, when applicable, legal guardians to ensure the religious and moral education of their children in conformity with their own convictions.

Article 19

1. Everyone shall have the right to hold opinions without interference.

2. Everyone shall have the right to freedom of expression; this right shall include freedom to seek, receive and impart information and ideas of all kinds, regardless of frontiers, either orally, in writing or in print, in the form of art, or through any other media of his choice.

3. The exercise of the rights provided for in paragraph 2 of this article carries with it special duties and responsibilities. It may therefore be subject to certain restrictions, but these shall only be such as are provided by law and are necessary:

(a) For respect of the rights or reputations of others;

(b) For the protection of national security or of public order (ordre public), or of public health or morals.

Article 20

1. Any propaganda for war shall be prohibited by law.

2. Any advocacy of national, racial or religious hatred that constitutes incitement to discrimination, hostility or violence shall be prohibited by law.

Article 21

The right of peaceful assembly shall be recognized. No restrictions may be placed on the exercise of this right other than those imposed in conformity with the law and which are necessary in a democratic society in the interests of national security or public safety, public order (ordre public), the protection of public health or morals or the protection of the rights and freedoms of others.

Article 22

1. Everyone shall have the right to freedom of association with others, including the right to form and join trade unions for the protection of his interests.

2. No restrictions may be placed on the exercise of this right other than those which are prescribed by law and which are necessary in a democratic society in the interests of national security or public safety, public order (ordre public), the protection of public health or morals or the protection of the rights and freedoms of others. This article shall not prevent the imposition of lawful restrictions on members of the armed forces and of the police in their exercise of this right.

3. Nothing in this article shall authorize States Parties to the International Labour Organisation Convention of 1948 concerning Freedom of Association and Protection of the Right to Organize to take legislative measures which would prejudice, or to apply the law in such a manner as to prejudice, the guarantees provided for in that Convention.

Article 23

1. The family is the natural and fundamental group unit of society and is entitled to protection by society and the State.

2. The right of men and women of marriageable age to marry and to found a family shall be recognized.

3. No marriage shall be entered into without the free and full consent of the intending spouses.

4. States Parties to the present Covenant shall take appropriate steps to ensure equality of rights and responsibilities of spouses as to marriage, during marriage and at its dissolution. In the case of dissolution, provision shall be made for the necessary protection of any children.

Article 24

1. Every child shall have, without any discrimination as to race, colour, sex, language, religion, national or social origin, property or birth, the right to such measures of protection as are required by his status as a minor, on the part of his family, society and the State.

2. Every child shall be registered immediately after birth and shall have a name.

3. Every child has the right to acquire a nationality.

Article 25

Every citizen shall have the right and the opportunity, without any of the distinctions mentioned in article 2 and without unreasonable restrictions:

(a) To take part in the conduct of public affairs, directly or through freely chosen representatives;

(b) To vote and to be elected at genuine periodic elections which shall be by universal and equal suffrage and shall be held by secret ballot, guaranteeing the free expression of the will of the electors;

(c) To have access, on general terms of equality, to public service in his country.

Article 26

All persons are equal before the law and are entitled without any discrimination to the equal protection of the law. In this respect, the law shall prohibit any discrimination and guarantee to all persons equal and effective protection against discrimination on any ground such as race, colour, sex, language, religion, political or other opinion, national or social origin, property, birth or other status.

Article 27

In those States in which ethnic, religious or linguistic minorities exist, persons belonging to such minorities shall not be denied the right, in community with the other members of their group, to enjoy their own culture, to profess and practise their own religion, or to use their own language.

PART IV

Article 28

1. There shall be established a Human Rights Committee (hereafter referred to in the present Covenant as the Committee). It shall consist of eighteen members and shall carry out the functions hereinafter provided.

2. The Committee shall be composed of nationals of the States Parties to the present Covenant who shall be persons of high moral character and recognized competence in the field of human rights, consideration being given to the usefulness of the participation of some persons having legal experience.

3. The members of the Committee shall be elected and shall serve in their personal capacity.

Article 29

1. The members of the Committee shall be elected by secret ballot from a list of persons possessing the qualifications prescribed in article 28 and nominated for the purpose by the States Parties to the present Covenant.

2. Each State Party to the present Covenant may nominate not more than two persons. These persons shall be nationals of the nominating State.

3. A person shall be eligible for renomination.

Article 30

1. The initial election shall be held no later than six months after the date of the entry into force of the present Covenant.

2. At least four months before the date of each election to the Committee, other than an election to fill a vacancy declared in accordance with article 34, the Secretary-General of the United Nations shall address a written invitation to the States Parties to the present Covenant to submit their nominations for membership of the Committee within three months.

3. The Secretary-General of the United Nations shall prepare a list in alphabetical order of all the persons thus nominated, with an indication of the States Parties which have nominated them, and shall submit it to the States Parties to the present Covenant no later than one month before the date of each election.

4. Elections of the members of the Committee shall be held at a meeting of the States Parties to the present Covenant convened by the Secretary General of the United Nations at the Headquarters of the United Nations. At that meeting, for which two thirds of the States Parties to the present Covenant shall constitute a quorum, the persons elected to the Committee shall be those nominees who obtain the largest number of votes and an absolute majority of the votes of the representatives of States Parties present and voting.

Article 31

1. The Committee may not include more than one national of the same State.

2. In the election of the Committee, consideration shall be given to equitable geographical distribution of membership and to the representation of the different forms of civilization and of the principal legal systems.

Article 32

1. The members of the Committee shall be elected for a term of four years. They shall be eligible for re-election if renominated. However, the terms of nine of the members elected at the first election shall expire at the end of two years; immediately after the first election, the names of these nine members shall be chosen by lot by the Chairman of the meeting referred to in article 30, paragraph 4.

2. Elections at the expiry of office shall be held in accordance with the preceding articles of this part of the present Covenant.

Article 33

1. If, in the unanimous opinion of the other members, a member of the Committee has ceased to carry out his functions for any cause other than absence of a temporary character, the Chairman of the Committee shall notify the Secretary-General of the United Nations, who shall then declare the seat of that member to be vacant.

2. In the event of the death or the resignation of a member of the Committee, the Chairman shall immediately notify the Secretary-General of the United Nations, who shall declare the seat vacant from the date of death or the date on which the resignation takes effect.

Article 34

1. When a vacancy is declared in accordance with article 33 and if the term of office of the member to be replaced does not expire within six months of the declaration of the vacancy, the Secretary-General of the United Nations shall notify each of the States Parties to the present Covenant, which may within two months submit nominations in accordance with article 29 for the purpose of filling the vacancy.

2. The Secretary-General of the United Nations shall prepare a list in alphabetical order of the persons thus nominated and shall submit it to the States Parties to the present Covenant. The election to fill the vacancy shall then take place in accordance with the relevant provisions of this part of the present Covenant.

3. A member of the Committee elected to fill a vacancy declared in accordance with article 33 shall hold office for the remainder of the term of the member who vacated the seat on the Committee under the provisions of that article.

Article 35

The members of the Committee shall, with the approval of the General Assembly of the United Nations, receive emoluments from United Nations resources on such terms and conditions as the General Assembly may decide, having regard to the importance of the Committee's responsibilities.

Article 36

The Secretary-General of the United Nations shall provide the necessary staff and facilities for the effective performance of the functions of the Committee under the present Covenant.

Article 37

1. The Secretary-General of the United Nations shall convene the initial meeting of the Committee at the Headquarters of the United Nations.

2. After its initial meeting, the Committee shall meet at such times as shall be provided in its rules of procedure.

3. The Committee shall normally meet at the Headquarters of the United Nations or at the United Nations Office at Geneva.

Article 38

Every member of the Committee shall, before taking up his duties, make a solemn declaration in open committee that he will perform his functions impartially and conscientiously.

Article 39

1. The Committee shall elect its officers for a term of two years. They may be re-elected.

2. The Committee shall establish its own rules of procedure, but these rules shall provide, inter alia, that:

(a) Twelve members shall constitute a quorum;

(b) Decisions of the Committee shall be made by a majority vote of the members present.

Article 40

1. The States Parties to the present Covenant undertake to submit reports on the measures they have adopted which give effect to the rights recognized herein and on the progress made in the enjoyment of those rights: (a) Within one year of the entry into force of the present Covenant for the States Parties concerned;

(b) Thereafter whenever the Committee so requests.

2. All reports shall be submitted to the Secretary-General of the United Nations, who shall transmit them to the Committee for consideration. Reports shall indicate the factors and difficulties, if any, affecting the implementation of the present Covenant.

3. The Secretary-General of the United Nations may, after consultation with the Committee, transmit to the specialized agencies concerned copies of such parts of the reports as may fall within their field of competence.

4. The Committee shall study the reports submitted by the States Parties to the present Covenant. It shall transmit its reports, and such general comments as it may consider appropriate, to the States Parties. The Committee may also transmit to the Economic and Social Council these comments along with the copies of the reports it has received from States Parties to the present Covenant.

5. The States Parties to the present Covenant may submit to the Committee observations on any comments that may be made in accordance with paragraph 4 of this article.

Article 41

1. A State Party to the present Covenant may at any time declare under this article that it recognizes the competence of the Committee to receive and consider communications to the effect that a State Party claims that another State Party is not fulfilling its obligations under the present Covenant. Communications under this article may be received and considered only if submitted by a State Party which has made a declaration recognizing in regard to itself the competence of the Committee. No communication shall be received by the Committee if it concerns a State Party which has not made such a declaration. Communications received under this article shall be dealt with in accordance with the following procedure:

(a) If a State Party to the present Covenant considers that another State Party is not giving effect to the provisions of the present Covenant, it may, by written communication, bring the matter to the attention of that State Party. Within three months after the receipt of the communication the receiving State shall afford the State which sent the communication an explanation, or any other statement in writing clarifying the matter which should include, to the extent possible and pertinent, reference to domestic procedures and remedies taken, pending, or available in the matter;

(b) If the matter is not adjusted to the satisfaction of both States Parties concerned within six months after the receipt by the receiving State of the initial communication, either State shall have the right to refer the matter to the Committee, by notice given to the Committee and to the other State;

(c) The Committee shall deal with a matter referred to it only after it has ascertained that all available domestic remedies have been invoked and exhausted in the matter, in conformity with the generally recognized principles of international law. This shall not be the rule where the application of the remedies is unreasonably prolonged;

(d) The Committee shall hold closed meetings when examining communications under this article;

(e) Subject to the provisions of subparagraph (c), the Committee shall make available its good offices to the States Parties concerned with a view to a friendly solution of the matter on the basis of respect for human rights and fundamental freedoms as recognized in the present Covenant;

(f) In any matter referred to it, the Committee may call upon the States Parties concerned, referred to in subparagraph (b), to supply any relevant information;

(g) The States Parties concerned, referred to in subparagraph (b), shall have the right to be represented when the matter is being considered in the Committee and to make submissions orally and/or in writing;

(h) The Committee shall, within twelve months after the date of receipt of notice under subparagraph (b), submit a report:

(i) If a solution within the terms of subparagraph (e) is reached, the Committee shall confine its report to a brief statement of the facts and of the solution reached;

(ii) If a solution within the terms of subparagraph (e) is not reached, the Committee shall confine its report to a brief statement of the facts; the written submissions and record of the oral submissions made by the States Parties concerned shall be attached to the report. In every matter, the report shall be communicated to the States Parties concerned.

2. The provisions of this article shall come into force when ten States Parties to the present Covenant have made declarations under paragraph I of this article. Such declarations shall be deposited by the States Parties with the Secretary-General of the United Nations, who shall transmit copies thereof to the other States Parties. A declaration may be withdrawn at any time by notification to the Secretary-General. Such a withdrawal shall not prejudice the consideration of any matter which is the subject of a communication already transmitted under this article; no further communication by any State Party shall be received after the notification of withdrawal of the declaration has been received by the Secretary-General, unless the State Party concerned has made a new declaration.

Article 42

1.

(a) If a matter referred to the Committee in accordance with article 41 is not resolved to the satisfaction of the States Parties concerned, the Committee may, with the prior consent of the States Parties concerned, appoint an ad hoc Conciliation Commission (hereinafter referred to as the Commission). The good offices of the Commission shall be made available to the States Parties concerned with a view to an amicable solution of the matter on the basis of respect for the present Covenant;

(b) The Commission shall consist of five persons acceptable to the States Parties concerned. If the States Parties concerned fail to reach agreement within three months on all or part of the composition of the Commission, the members of the Commission concerning whom no agreement has been reached shall be elected by secret ballot by a two-thirds majority vote of the Committee from among its members.

2. The members of the Commission shall serve in their personal capacity. They shall not be nationals of the States Parties concerned, or of a State not Party to the present Covenant, or of a State Party which has not made a declaration under article 41.

3. The Commission shall elect its own Chairman and adopt its own rules of procedure.

4. The meetings of the Commission shall normally be held at the Headquarters of the United Nations or at the United Nations Office at Geneva. However, they may be held at such other convenient places as the Commission may determine in consultation with the Secretary-General of the United Nations and the States Parties concerned.

5. The secretariat provided in accordance with article 36 shall also service the commissions appointed under this article.

6. The information received and collated by the Committee shall be made available to the Commission and the Commission may call upon the States Parties concerned to supply any other relevant information.

7. When the Commission has fully considered the matter, but in any event not later than twelve months after having been seized of the matter, it shall submit to the Chairman of the Committee a report for communication to the States Parties concerned:

(a) If the Commission is unable to complete its consideration of the matter within twelve months, it shall confine its report to a brief statement of the status of its consideration of the matter;

(b) If an amicable solution to the matter on tie basis of respect for human rights as recognized in the present Covenant is reached, the Commission shall confine its report to a brief statement of the facts and of the solution reached;

(c) If a solution within the terms of subparagraph (b) is not reached, the Commission's report shall embody its findings on all questions of fact relevant to the issues between the States Parties concerned, and its views on the possibilities of an amicable solution of the matter. This report shall also contain the written submissions and a record of the oral submissions made by the States Parties concerned;

(d) If the Commission's report is submitted under subparagraph (c), the States Parties concerned shall, within three months of the receipt of the report, notify the Chairman of the Committee whether or not they accept the contents of the report of the Commission.

8. The provisions of this article are without prejudice to the responsibilities of the Committee under article 41.

9. The States Parties concerned shall share equally all the expenses of the members of the Commission in accordance with estimates to be provided by the Secretary-General of the United Nations.

10. The Secretary-General of the United Nations shall be empowered to pay the expenses of the members of the Commission, if necessary, before reimbursement by the States Parties concerned, in accordance with paragraph 9 of this article.

Article 43

The members of the Committee, and of the ad hoc conciliation commissions which may be appointed under article 42, shall be entitled to the facilities, privileges and immunities of experts on mission for the United Nations as laid down in the relevant sections of the Convention on the Privileges and Immunities of the United Nations.

Article 44

The provisions for the implementation of the present Covenant shall apply without prejudice to the procedures prescribed in the field of human rights by or under the constituent instruments and the conventions of the United Nations and of the specialized agencies and shall not prevent the States Parties to the present Covenant from having recourse to other procedures for settling a dispute in accordance with general or special international agreements in force between them.

Article 45

The Committee shall submit to the General Assembly of the United Nations, through the Economic and Social Council, an annual report on its activities.

PART V

Article 46

Nothing in the present Covenant shall be interpreted as impairing the provisions of the Charter of the United Nations and of the constitutions of the specialized agencies which define the respective responsibilities of the various organs of the United Nations and of the specialized agencies in regard to the matters dealt with in the present Covenant.

Article 47

Nothing in the present Covenant shall be interpreted as impairing the inherent right of all peoples to enjoy and utilize fully and freely their natural wealth and resources.

PART VI

Article 48

1. The present Covenant is open for signature by any State Member of the United Nations or member of any of its specialized agencies, by any State Party to the Statute of the International Court of Justice, and by any other State which has been invited by the General Assembly of the United Nations to become a Party to the present Covenant.

2. The present Covenant is subject to ratification. Instruments of ratification shall be deposited with the Secretary-General of the United Nations.

3. The present Covenant shall be open to accession by any State referred to in paragraph 1 of this article.

4. Accession shall be effected by the deposit of an instrument of accession with the Secretary-General of the United Nations.

5. The Secretary-General of the United Nations shall inform all States which have signed this Covenant or acceded to it of the deposit of each instrument of ratification or accession.

Article 49

1. The present Covenant shall enter into force three months after the date of the deposit with the Secretary-General of the United Nations of the thirty-fifth instrument of ratification or instrument of accession.

2. For each State ratifying the present Covenant or acceding to it after the deposit of the thirty-fifth instrument of ratification or instrument of accession, the present Covenant shall enter into force three months after the date of the deposit of its own instrument of ratification or instrument of accession.

Article 50

The provisions of the present Covenant shall extend to all parts of federal States without any limitations or exceptions.

Article 51

1. Any State Party to the present Covenant may propose an amendment and file it with the Secretary-General of the United Nations. The Secretary-General of the United Nations shall thereupon communicate any proposed amendments to the States Parties to the present Covenant with a request that they notify him whether they favour a conference of States Parties for the purpose of considering and voting upon the proposals. In the event that at least one third of the States Parties favours such a conference, the Secretary-General shall convene the conference under the auspices of the United Nations. Any amendment adopted by a majority of the States Parties present and voting at the conference shall be submitted to the General Assembly of the United Nations for approval.

2. Amendments shall come into force when they have been approved by the General Assembly of the United Nations and accepted by a two-thirds majority of the States Parties to the present Covenant in accordance with their respective constitutional processes. 3. When amendments come into force, they shall be binding on those States Parties which have accepted them, other States Parties still being bound by the provisions of the present Covenant and any earlier amendment which they have accepted.

Article 52

1. Irrespective of the notifications made under article 48, paragraph 5, the Secretary-General of the United Nations shall inform all States referred to in paragraph I of the same article of the following particulars:

(a) Signatures, ratifications and accessions under article 48;

(b) The date of the entry into force of the present Covenant under article 49 and the date of the entry into force of any amendments under article 51.

Article 53

1. The present Covenant, of which the Chinese, English, French, Russian and Spanish texts are equally authentic, shall be deposited in the archives of the United Nations.

2. The Secretary-General of the United Nations shall transmit certified copies of the present Covenant to all States referred to in article 48.

The Universal Declaration of Human Rights

Preamble

Whereas recognition of the inherent dignity and of the equal and inalienable rights of all members of the human family is the foundation of freedom, justice and peace in the world,

Whereas disregard and contempt for human rights have resulted in barbarous acts which have outraged the conscience of mankind, and the advent of a world in which human beings shall enjoy freedom of speech and belief and freedom from fear and want has been proclaimed as the highest aspiration of the common people,

Whereas it is essential, if a man is not to be compelled to have recourse, as a last resort, to rebellion against tyranny and oppression, that human rights should be protected by the rule of law,

Whereas it is essential to promote the development of friendly relations between nations,

Whereas the peoples of the United Nations have in the Charter reaffirmed their faith in fundamental human rights, in the dignity and worth of the human person and in the equal rights of men and women and have determined to promote social progress and better standards of life in larger freedom,

Whereas Member States have pledged themselves to achieve, in co-operation with the United Nations, the promotion of universal respect for and observance of human rights and fundamental freedoms,

Whereas a common understanding of these rights and freedoms is of the greatest importance for the full realization of this pledge,

Now Therefore,

The General Assembly Proclaims

This Universal Declaration of Human Rights as a common standard of achievement for all peoples and all nations, to the end that every individual and every organ of society, keeping this Declaration constantly in mind, shall strive by teaching and education to promote respect for these rights and freedoms and by progressive measures, national and international, to secure their universal and effective recognition and observance, both among the peoples of Member States themselves and among peoples of territories under their jurisdiction.

Article 1

All human beings are born free and equal in dignity and rights. They are endowed with reason and conscience and should act toward one another in a spirit of brotherhood.

Article 2

Everyone is entitled to all the rights and freedoms set forth in this Declaration, without distinction of any kind, such as race, color, sex, language, religion, political or other opinion, national or social origin, property, birth or other status.

Furthermore, no distinction shall be made on the basis of the political, jurisdictional or international status of the country or territory to which a person belongs, whether it be independent, trust, non-self-governing or under any other limitation of sovereignty.

Article 3

Everyone has the right to life, liberty and security of person.

Article 4

No one shall be held in slavery or servitude; slavery and the slave trade shall be prohibited in all their forms.

Article 5

No one shall be subjected to torture or to cruel, inhuman or degrading treatment or punishment.

Article 6

Everyone has the right to recognition everywhere as a person before the law.

Article 7

All are equal before the law and are entitled without any discrimination to equal protection of the law. All are entitled to equal protection against any discrimination in violation of this Declaration and against any incitement to such discrimination.

Article 8

Everyone has the right to an effective remedy by the competent national tribunals for acts violating the fundamental rights granted him by the constitution or by law.

Article 9

No one shall be subjected to arbitrary arrest, detention or exile.

Article 10

Everyone is entitled in full equality to a fair and public hearing by an independent and impartial tribunal, in the determination of his rights and obligations and of any criminal charge against him.

Article 11

1) Everyone charged with a penal offense has the right to be presumed innocent until proved guilty according to law in a public trial at which he has had all the guarantees necessary for his defense.

2) No one shall be held guilty of any penal offense on account of any act or omission which did not constitute a penal offense, under national or international law, at the time when it was committed. Nor shall a heavier penalty be imposed than the one that was applicable at the time the penal offense was committed.

Article 12

No one shall be subjected to arbitrary interference with his privacy, family, home or correspondence, nor to attacks upon his honor and reputation. Everyone has the right to the protection of the law against such interference or attacks.

Article 13

1) Everyone has the right to freedom of movement and residence within the borders of each State.

2) Everyone has the right to leave any country, including his own, and to return to his country.

Article 14

1) Everyone has the right to seek and to enjoy in other countries asylum from persecution.

2) This right may not be invoked in the case of prosecutions genuinely arising from non-political crimes or from acts contrary to the purposes and principles of the United Nations.

Article 15

1) Everyone has the right to a nationality.

2) No one shall be arbitrarily deprived of his nationality nor denied the right to change his nationality.

Article 16

1) Men and women of full age, without any limitation due to race, nationality or religion, have the right to marry and to found a family. They are entitled to equal rights as to marriage, during marriage and at its dissolution.

2) Marriage shall be entered into only with the free and full consent of the intending spouses.

3) The family is the natural and fundamental group unit of society and is entitled to protection by society and the State.

Article 17

1) Everyone has the right to own property alone as well as in association with others.

2) No one shall be arbitrarily deprived of his property.

Article 18

Everyone has the right to freedom of thought, conscience and religion; this right includes freedom to change his religion or belief, and freedom, either alone or in community with others and in public and private, to manifest his religion or belief in teaching, practice, worship and observance.

Article 19

Everyone has the right to freedom of opinion and expression; this right includes freedom to hold opinions without interference and to seek, receive and impart information and ideas through any media and regardless of frontiers.

Article 20

1) Everyone has the right to freedom of peaceful assembly and association.

2) No one may be compelled to belong to an association.

Article 21

1) Everyone has the right to take part in the government of his country, directly or through freely chosen representatives.

2) Everyone has the right of equal access to public service in his country.

3) The will of the people shall be the basis of the authority of government; this will shall be expressed in periodic and genuine elections which shall be by universal and equal suffrage and shall be held by secret vote or by equivalent free voting procedures.

Article 22

Everyone, as a member of society, has the right to social security and is entitled to realization, through national effort and international co-operation and in accordance with the organization and resources of each State, of the economic, social and cultural rights indispensable for his dignity and the free development of his personality.

Article 23

1) Everyone has the right to work, to free choice of employment, to just and favorable conditions of work and to protection against unemployment.

2) Everyone, without any discrimination, has the right to equal pay for equal work.

3) Everyone who works has the right to just and favorable remuneration ensuring for himself and his family an existence worthy of human dignity, and supplemented, if necessary, by other means of social protection.

4) Everyone has the right to form and to join trade unions for the protection of his interests.

Article 24

Everyone has the right to rest and leisure, including reasonable limitation of working hours and periodic holidays with pay.

Article 25

1) Everyone has the right to a standard of living adequate for the health and well-being of himself and of his family, including food, clothing, housing and medical care and necessary social services, and the right to security in the event of unemployment, sickness, disability, widowhood, old age or other lack of livelihood in circumstances beyond his control.

2) Motherhood and childhood are entitled to special care and assistance. All children, whether born in or out of wedlock, shall enjoy the same social protection.

Article 26

1) Everyone has the right to education. Education shall be free, at least in the elementary and fundamental stages. Elementary education shall be compulsory. Technical and professional education shall be made generally available and higher education shall be equally accessible to all on the basis of merit.

2) Education shall be directed to the full development of the human personality and to the strengthening of respect for human rights and fundamental freedoms. It shall promote understanding, tolerance and friendship among all nations, racial or religious groups, and shall further the activities of the United Nations for the maintenance of peace.

3) Parents have a prior right to choose the kind of education that shall be given to their children.

Article 27

1) Everyone has the right freely to participate in the cultural life of the community, to enjoy the arts and to share in scientific advancement and its benefits.

2) Everyone has the right to the protection of the moral and material interests resulting from any scientific, literary or artistic production of which he is the author.

Article 28

Everyone is entitled to a social and international order in which the rights and freedoms set forth in this Declaration can be fully realized.

Article 29

1) Everyone has duties to the community in which alone the free and full development of his personality is possible.

2) In the exercise of his rights and freedoms, everyone shall be subject only to such limitations as are determined by law solely for the purpose of securing due recognition and respect for the rights and freedoms of others and of meeting the just requirements of morality, public order and the general welfare in a democratic society.

3) These rights and freedoms may in no case be exercised contrary to the purposes and principles of the United Nations.

Article 30

Nothing in this Declaration may be interpreted as implying for any State, group or person any right to engage in any activity or to perform any act aimed at the destruction of any of the rights and freedoms set forth herein.

The Universal Declaration of Human Rights (abbreviated)

Article 1          Right to Equality

Article 2          Freedom from Discrimination

Article 3          Right to Life, Liberty, Personal Security

Article 4          Freedom from Slavery

Article 5          Freedom from Torture and Degrading Treatment

Article 6          Right to Recognition as a Person before the Law

Article 7          Right to Equality before the Law

Article 8          Right to Remedy by Competent Tribunal

Article 9          Freedom from Arbitrary Arrest and Exile

Article 10        Right to Fair Public Hearing

Article 11        Right to be Considered Innocent until Proven Guilty

Article 12        Freedom from Interference with Privacy, Family, Home and Correspondence

Article 13        Right to Free Movement in and out of the Country

Article 14        Right to Asylum in other Countries from Persecution

Article 15        Right to a Nationality and the Freedom to Change It

Article 16        Right to Marriage and Family

Article 17        Right to Own Property

Article 18        Freedom of Belief and Religion

Article 19        Freedom of Opinion and Information

Article 20        Right of Peaceful Assembly and Association

Article 21        Right to Participate in Government and in Free Elections

Article 22        Right to Social Security

Article 23        Right to Desirable Work and to Join Trade Unions

Article 24        Right to Rest and Leisure

Article 25        Right to Adequate Living Standard

Article 26        Right to Education

Article 27        Right to Participate in the Cultural Life of Community

Article 28        Right to a Social Order that Articulates this Document

Article 29        Community Duties Essential to Free and Full Development

Article 30        Freedom from State or Personal Interference in the above Rights

State Human Rights Commission Tamilnadu

The State Human Rights Commission is an expression of Tamil Nadu's concern for the protection and promotion of human rights. It came into being in April 1997.

Frequently Asked Questions (FAQs):

What functions have been assigned to the Commission under the act?

The Commission shall, perform all or any of the following functions, namely:-

a) inquire, on its own initiative or on a petition presented to it by a victim or any person on his behalf, into complaint of-

(i) violation of human rights or abetment thereof  or (ii) negligence in the prevention of such violation by, a public servant ;

b) intervene in any proceeding involving any allegation of violation of human rights pending before a court with the approval of such court;

c) visit, under intimation to the State Government, any jail or any other institution under the control of the State Government, where persons are detained or lodged for purposes of treatment, reformation or protection to study the living conditions of the inmates and make recommendations thereon;

d) review the safeguards provided by or under the Constitution or any law for the time being in force for the protection of human rights and recommend measures for their effective implementation;

e) review the factors, including acts of terrorism that inhibit the enjoyment of human rights and recommend appropriate remedial measures;

f) study treaties and other international instruments on human rights and make recommendations for their effective implementation;

g) undertake and promote research in the field of human rights;

h) spread human rights literacy among various sections of society and promote awareness of the safeguards available for the protection of these rights through publications, the media, seminars and other available means;

i) encourage the efforts of non-governmental organisations and institutions working in the field of human rights;

j) such other functions as it may consider necessary for the promotion of human rights.

What powers have been vested with the Commission relating to inquires?

While inquiring into complaints under the Act, the Commission shall have all the powers of a civil court trying a suit under the Code of Civil Procedure, 1908, and in particular the following, namely-

a) summoning and enforcing the attendance of witnesses and examining them on oath;

b) discovery and production of any document;

c) receiving evidence on affidavits;

d) requisitioning any public record or copy thereof from any court or office;

e) issuing commissions for the examination of witnesses or documents;

f) any other matter which may be prescribed.

Does the Commission have its own investigation team?

Yes. The Commission has its own investigating staff for investigation into complaints of human rights violations. Under the Act, it is open to the Commission to utilise the services of any officer or investigation agency of the Central Government or any State Government. The Commission has associated, in a number of cases, non-governmental organisations in investigation work.

Is the Commission autonomous?

Yes. The autonomy of the Commission derives, inter-alia, from the method of appointing its Members, their fixity of tenure, and statutory guarantees thereto, the status they have been accorded and the manner in which the staff responsible to the Commission - including its investigative agency - will be appointed and conduct themselves. The financial economy of the Commission is spelt out in Section 32 of the Act.

How does the Commission inquire into complaints?

The Commission while inquiring into complaints of violations of human rights may call for information or report from the Central Government or any State Government or any other authority or organisation subordinate thereto within such time as may be specified by it; provided that if the information or report is not received within the time stipulated by the Commission, it may proceed to inquire into the complaint on its own; On the other hand, if, on receipt of information or report, the Commission is satisfied either that no further inquiry is required or that the required action has been initiated or taken by the concerned Government or authority, it may not proceed with the complaint and inform the complainant accordingly.

What steps are open to the Commission after inquiry?

The Commission may take any of the following steps upon the completion of an inquiry:

1 where the inquiry discloses the commission of violation of human rights or negligence in the prevention of violation of human rights by a public servant, it may recommend to the concerned Government or authority the initiation of proceedings for prosecution or such other action as the Commission may deem fit against the concerned person or persons;

2 approach the Supreme Court or the High Court concerned for such directions, orders or writs as that Court may deem necessary;

3 recommend to the concerned Government or authority for the grant of such immediate interim relief to the victim or the members of his family as the Commission may consider necessary.

What procedure is prescribed under the Act with respect to armed forces?

The Commission may on its own motion or on the basis of petitions made to it on allegations of human rights violations by armed forces, seek a report from the Central Government. On receipt of the report, it may either not proceed with the complaint or, as the case may be, make its recommendations to the Government. According to the Act, the Central Government shall inform the Commission of the action taken on the recommendations within three months or such further time as the Commission may allow. It is further stipulated that the Commission shall publish its report together with its recommendations made to the Central Government and the action taken by that Government on such recommendations. A copy of the report so published will also be given to the petitioner.

Can the complaint be in any language?

They may be in Hindi, English or in any language included in the Eighth Schedule of the Constitution. The complaints are expected to be self contained. No fee is charged on complaints. The Commission may ask for further information and affidavits to be filed in support of allegations whenever considered necessary. The Commission may, in its discretion, accept telegraphic complaints and complaints conveyed through FAX.

What kinds of complaints are not entertained by the Commission?

Ordinarily, complaints of the following nature are not entertained by the Commission:

a) in regard to events which happened more than one year before the making of the complaints;

b) with regard to matters which are sub-judice;

c) which are vague, anonymous or pseudonymous;

d) which are of frivolous nature;

e) which pertain to service matters

What is the responsibility of the authority/State/Central Governments to which report/recommendations have been sent by the Commission?

The authority/State Government/Central Government has to indicate its comments/action taken on the report/recommendations of the Commission within a period of one month in respect of general complaints and within three months in respect of complaints relating to armed forces.

Where is the Commission located? And what are its contact numbers?

The State Human Rights Commission,

Thiruvarangam,

143, P.S. Kumarasamy Raja Salai (Greenways Road),

Chennai 600 028,

Tamilnadu.

Phone: 91-44-2495 1484

Fax: 91-44-2495 1484

BOPP Tapes

BOPP: biaxial oriented polypropylene

BOPP Packing Tape

BOPP packing tapes are some of the most commonly used tapes in shipping and inventory management today, and with good reason. The special molecular structure and the resin stabilization of polypropylene offer excellent mechanical and optical properties, which are especially useful in a variety of applications, one of which is packaging.

The Material

BOPP packing tape is made from biaxial oriented polypropylene (BOPP) film. Polypropylene is a thermoplastic polymer (which means it is pliable above a certain temperature, and returns to the solid state after cooling). Now, biaxial oriented polypropylene is a PP film stretched according to the machine direction and across the machine direction. This increases the strength as well as the clarity of the film. The structure also makes the automated and manual application of the packaging tape easier.

Features and Performance

Its rugged structure and high tensile strength make it the ideal material for packaging and labeling. It is also resistant to abrasion, moisture and various chemical solvents. It is easy to coat, print and even to laminate, which make it ideal for the manufacture of custom packaging tape. The material also offers minimal elongation (only around 150%, on average), and is burst-resistant. It is also easy to slit.

The material is a thermoplastic polymer so it could work in higher and lower temperatures. Not all manufacturers provide tensile strength statistics but industrial grade packing tape should be able to bear longitudinal pressure of around 27 pounds per inch and 44 lbs. per inch, transverse.

The average application temperature range for 30-micron, standard thickness (1.9 to 2.2 MIL) BOPP packaging tapes is between 35 and 110 degrees F while the operating temperature range is at 20 to 150 degrees F.

Most BOPP films are also non-toxic and therefore safe to use. Some comply with environmental protection standards, and some are even made of recycled material.

Adhesives

BOPP packing tapes are coated with different types of adhesive. The most commonly used are hot melt synthetic rubber and acrylic. Hot melt adhesives are one of the most widely used because of the consistent, reliable and quick seals. This kind of adhesive quickly bonds to the surface and offers high tensile strength, which make it one of the best choices for securing shipment. It could adhere well to various surfaces including film and fiberboard.

Acrylic adhesives are another good option. They do not bond as quickly as hot melt adhesives (it has decent initial adhesion but it features gradual adhesion buildup that require around 24 hours to achieve maximum bond strength), but they have better heat, UV and shear resistance. This type of adhesive is recommended for heady-duty and long-term packaging.

Other adhesives include natural rubber, which has the same properties as hot melt synthetic rubber, except that it has better hold and could stick to dust, and heavy loads with various temperatures. Silicone adhesives are used too; it can be removed without leaving residue and is often used for applications that require exposure to extreme temperature.

Specifications

Most carrier or backing films have specs of 30 to 65 microns. The standard-duty tapes typically have thickness of around 2.0 MILs. Note that this already includes the carrier or backing film and the adhesive. Medium-duty packing tapes typically are around 2.6 MILs thick. Heavy duty adhesives have around 3.0 MILs (1 mil is 1/1000 of an inch).

These packing tapes come in various widths too, with the 2-inch variety being the standard. Packing tapes with widths of 3/8 to 4 inches could be purchased in bulk. Standard length is 110 yards but 55-yard rolls are available as well.

BOPP tapes typically come in the standard colors – clear and brown, although manufacturers now offer them in various colors such as red, pink, orange, yellow, green, black, white, purple and blue.

Types of BOPP Packing Tape

There are three major types of BOPP packing tape – transparent, colored and printed/customized. Transparent BOPP adhesive tapes are ideal for shipment with special care instructions or products with packaging that must remain visible. Colored BOPP packing tapes are handy for inventory management as they can be utilized as a product identification and organization tool. Custom packing tape contribute to a more efficient inventory management, but the printed message can also be handy in communicating special care instructions, and the custom design and message could help in advertising and building brand awareness.

Radiation and Life

Radiation and Life - World Nuclear Association

"Life on earth has developed with an ever present background of radiation. It is not something new, invented by the wit of man: radiation has always been there."

-Eric J Hall, Professor of Radiology, College of Physicians and Surgeons, Columbia University, New York, in his book "Radiation and Life".

Contents: Unstable Atoms, Atomic Decay, Half-life, Types of Ionizing radiation, Measuring Ionizing Radiation, What are the health risks from ionizing radiation?, Man-made Radiation, Protection from Radiation, Standards and Regulations, Understanding Radiation, Related Information.

How do Corals Reproduce?

Corals can reproduce asexually and sexually. Coral reproductive methods vary according to the species. Some species, such as brain and star corals, are hermaphrodites, meaning they produce both sperm and eggs at the same time. Other corals, such as elkhorn and boulder corals, are gonochoric, meaning that they produce single-sex colonies. In these species, all of the polyps in one colony produce only sperm, and all of the polyps in another colony produce only eggs.

Coral larvae are formed in two different ways. The larvae are either fertilized within the body of a polyp or fertilized outside of the polyp’s body in the water. Fertilization of an egg within the body of a coral polyp is achieved from sperm that is released through the mouth of another polyp. The sperm and egg merge and form a planula larva, which matures inside the body of its mother. When the larva is ready, it gets spit out into the water through the mouth of its mother.

Other species of coral reproduce by ejecting large quantities of eggs and sperm into the surrounding water. When this happens, the eggs and sperm fertilize in the water. This process is called coral spawning. In some areas, mass coral spawning events occur on one particular night per year and scientists can predict exactly when this will happen. Trillions of eggs and sperm are simultaneously released into the water in one of the most astounding acts of synchronicity in the natural world!

Once in the sea, larvae are naturally attracted to the light. They swim to the surface of the ocean, where they remain for days or even weeks. If predators do not eat the larvae during this time, they fall back to the ocean floor and attach themselves to a hard surface. An attached planula metamorphasizes into a coral polyp and begins to grow—dividing itself in half and making exact genetic copies of itself. As more and more polyps are added, a coral colony develops. Eventually the coral colony becomes mature, begins reproducing, and the cycle of life continues. 

How do Jet Pumps Work?

Jet pumps are also called ejector pumps. They are devices capable of handling and transporting all forms of motive fluid including gas, steam, or liquid. They can be considered mixers or circulators, since the intake combines multiple fluid sources. Multiple inlets are used to draw in a constant stream of fluid, using pressure to create lift through suction. The combination of intake pressure and velocity of the liquid or gas jets the media up from a well, tank, or pit through the pump to the discharge point.

Jet pumps are less efficient than typical centrifugal pumps due to such factors as friction loss, but may be more efficient when working with combined media that includes gases and in variable well conditions where the surface characteristics involve turbulence.

Jet pumps are centrifugal pumps with an ejector (venturi nozzle) attached at the discharge outlet. They function based upon the Venturi effect of Bernoulli's principle - utilizing constriction to reduce pressure and provide suction. After the pump is primed, a motive fluid is pumped through a standard centrifugal pump and enters an ejector. At the throat of the converging section of the ejector, the pressurized fluid is ejected at high velocity. This creates a low pressure (vacuum) at the throat, drawing the target fluid (from a well or other source) up into the nozzle.

Jet pumps consist of three sections: a centrifugal pump, a jet ejector package, and a foot valve.

The centrifugal pump generates the force which circulates the motive fluid through the ejector, typically using an impeller powered by a motor.

The jet ejector package (the nozzle, venturi, and various connections) is often separate from the pump before installation. Ejector components are carefully engineered to match the flow rate of a specific pump. During installation, it is important to read the ejector package instructions and set the package up correctly for the specific horsepower of the pump.

The foot valve is the section connected to the well or target resevoir. It receives fluid into the system and feeds the pump, filters debris and sediment from entering the system, and maintains the pump prime, preventing backflow.

Types

There are four main types of jet pumps, which vary based on application and size.

1. Deep well jet pumps are used in high volume applications, such as oil wells, which range from 800-15,000 feet in depth. The ejectors in these pumps are put down the well.

2. Shallow well pumps are used in applications where the media is close to the surface, such as residential wells. The ejectors in these pumps are bolted to the nose of the pump.

3. Convertible jet pumps are "convertible", meaning they can be set up to be used for either deep or shallow well applications.

4. Miniature jet pumps are used for smaller (typically commercial) applications, such as aquariums.