Trinidad and Tobago

There shall be a Parliament of Trinidad and Tobago which shall consist of the President, the Senate and the House of Representatives. (Sec. 39)

(1) The Senate shall consist of thirty-one members (in this Constitution referred to as “Senators”) who shall be appointed by the President in accordance with this section.
(2) Of the thirty-one Senators—
(a) sixteen shall be appointed by the President acting in accordance with the advice of the Prime Minister;
(b) six shall be appointed by the President acting in accordance with the advice of the Leader of the Opposition and;
(c) nine shall be appointed by the President in his discretion from outstanding persons from economic or social or community organisations and other major fields of endeavour. (Sec. 40)

Subject to section 42, a person shall be qualified to be appointed as a Senator if, and shall not be qualified to be so appointed unless, he is a citizen of Trinidad and Tobago of the age of twenty-five years or upwards. (Sec. 41)

(1) Subject to the provisions of this section, the House of Representatives shall consist of members who shall be elected in the manner provided by Parliament.
… (Sec. 46)

Subject to the provisions of section 48, a person shall be qualified to be elected as a member of the House of Representatives if, and shall not be qualified to be so elected unless, he—
(a) is a citizen of Trinidad and Tobago of the age of eighteen years or upwards, and
(b) has resided in Trinidad and Tobago for a period of two years immediately before the date of his nomination for election or is domiciled and resident in Trinidad and Tobago at that date. (Sec. 47)

Parliament may make laws for the peace, order and good government of Trinidad and Tobago, so, however, that the provisions of this Constitution or (in so far as it forms part of the law of Trinidad and Tobago) the Trinidad and Tobago Independence Act 1962 of the United Kingdom may not be altered except in accordance with the provisions of section 54. (Sec. 53)

(1) The election of members of the House of Representatives shall be by secret ballot and in accordance with the first-past-the-post system.
… (Sec. 73)