Namibia

(1) The President shall be the Head of State and of the Government and the Commander-in-Chief of the Defence Force.
(2) The executive power of the Republic of Namibia shall vest in the President and the Cabinet.
… (Art. 27)

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(3) Without derogating from the generality of the functions and powers contemplated by Sub-Article (1) hereof, the President shall preside over meetings of the Cabinet and shall have the power, subject to this Constitution to:
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(i) appoint the following persons:
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(bb) the Prime Minister;
(cc) the Deputy-Prime Minister;
(dd) Ministers and Deputy-Ministers;
… (Art. 32)

(1) Notwithstanding Article 29(2A)(c), the Cabinet shall consist of the President, the Vice-President, the Prime Minister, Deputy-Prime Minister and such other Ministers from the members of the National Assembly, including members nominated under Article 46(1)(b) hereof, for the purposes of administering and executing the functions of the Government.
(2) The President may, if he or she considers it to be necessary or expedient, also appoint a Deputy-Prime Minister to perform such functions as may be assigned to him or her by the President, the Vice-President or the Prime Minister.
… (Art. 35)

The Prime Minister shall be the leader of Government business in Parliament, shall coordinate the work of the Cabinet as head of administration, and shall perform other functions as may be assigned by the President or the Vice-President. (Art. 36)