Guyana

There shall be a President of the Co-operative Republic of Guyana, who shall be Head of State, the supreme executive authority, and Commander-in-Chief of the armed forces of the Republic. (Art. 89)

(1) A person shall be qualified for election as President and shall not be so qualified unless he or she -
(a) is a citizen of Guyana and is Guyanese by birth or parentage as defined in articles 43 and 44;
(b) is residing in Guyana on the date of nomination for election and was continuously residing therein for a period of seven years immediately before that date; and
(c) is otherwise qualified to be elected as a member of the National Assembly.
… (Art. 90)

(1) The executive authority of Guyana shall be vested in the President and, subject to the provisions of this Constitution, may be exercised by him or her either directly or through officers subordinate to him or her.
… (Art. 99)

(1) Any list of candidates for an election held pursuant to the provisions of article 60 (2) shall designate not more than one of those candidates as a Presidential candidate. An elector voting at such an election in favour of a list shall be deemed to be also voting in favour of the Presidential candidate named in the list.
(2) Where -
(a) there is only one Presidential candidate at the election; or
(b) there are two or more Presidential candidates, if more votes are cast in favour of the list in which a person is designated as Presidential candidate than in favour of any other list,
that Presidential candidate shall be deemed to be elected as President and shall be so declared by the Chairman of the Elections Commission acting only in accordance with the advice of the Chief Election Officer, after such advice has been tendered to the Elections Commission at a duly summoned meeting.
… (Art. 177)