Jamaica

1. There shall be in and for Jamaica a Cabinet which shall consist of the Prime Minister and such number of other Ministers (not being less than eleven) selected from among Ministers appointed in accordance with the provisions of section 70 of this Constitution, as the Prime Minister may from time to time consider appropriate.
2. The Cabinet shall be the principal instrument of policy and shall be charged with the general direction and control of the Government of Jamaica and shall be collectively responsible therefor to Parliament.
3. Not less than two nor more than four of the Ministers selected pursuant to subsection (1) shall be persons who are members of the Senate. (Sec. 69)

1. Whenever the Governor-General has occasion to appoint a Prime Minister he, acting in his discretion, shall appoint the member of the House of Representatives who, in his judgment, is best able to command the confidence of a majority of the members of that House and shall, acting in accordance with the advice of the Prime Minister, appoint from among the members of the two Houses such number of other Ministers as the Prime Minister may advise.
… (Sec. 70)