Guyana

Every person, who immediately before the commencement of this Constitution, is a citizen of Guyana shall continue to be a citizen of Guyana. (Art. 41)

(1) Every person who, immediately before the commencement of this Constitution, is or has been married to a person -
(a) who continues to be a citizen of Guyana by virtue of the preceding article; or
(b) who, having died before the commencement of this Constitution, would, but for his or her death, have continued to be a citizen of Guyana on that date by virtue of that article,
shall, if not otherwise a citizen, be entitled, upon making application and upon taking the oath of allegiance, to be registered as a citizen of Guyana:
Provided that the right to be registered as a citizen under this paragraph shall be subject to such exceptions or qualifications as may be prescribed in the interests of national security or public policy.
… (Art. 42)

Every person born in Guyana after the commencement of this Constitution shall become a citizen of Guyana at the date of his or her birth:
Provided that a person shall not become a citizen of Guyana by virtue of this article if at the time of his or her birth -
(a) his or her father or his or her mother possesses such immunity from suit and legal process as is accorded to an envoy of a foreign sovereign power accredited to Guyana and neither of them is a citizen of Guyana; or
(b) his or her father or his or her mother is an enemy alien and the birth occurs in a place then under occupation by the enemy. (Art. 43)

A person born outside Guyana after the commencement of this Constitution shall become a citizen of Guyana at the date of his or her birth if at that date his or her father or his or her mother is a citizen of Guyana otherwise than by virtue of this article. (Art. 44)

Any person who, after the commencement of this Constitution, marries a person who is or becomes a citizen of Guyana shall be entitled, upon making application in such manner and taking such oath of allegiance as may be prescribed, to be registered as a citizen of Guyana:
Provided that the right to be registered as a citizen of Guyana under this article shall be subject to such exceptions or qualifications as may be prescribed in the interests of national security or public policy. (Art. 45)

(1) If the President is satisfied that any citizen of Guyana has at any time after 25th May, 1966, acquired by registration, naturalisation or other voluntary and formal act (other than marriage) the citizenship of any country other than Guyana, the President may by order deprive that person of his or her citizenship.
(2) If the President is satisfied that any citizen of Guyana has at any time after 25 May, 1966, voluntarily claimed and exercised in a country other than Guyana any rights available to him under the law of that country, being rights accorded exclusively to its citizens, the President may by order deprive that person of his or her citizenship. (Art. 46)

(1) Parliament may make provision -
(a) for the acquisition of citizenship of Guyana by persons who do not become citizens of Guyana by virtue of the provisions of this Chapter²;
(b) for depriving of his or her citizenship of Guyana any person who is a citizen of Guyana otherwise than by virtue of article 41 (in so far as it relates to persons who became citizens of Guyana by virtue of articles 21, 23 and 24 of the Constitution of Guyana annexed to the Guyana Independence Order 1966), 43 or 44; or
(c) for the renunciation by any person of his or her citizenship of Guyana. (Art. 48)