45.—(1) The Minister may, in accordance with regulations made by him, promote any officer to a higher substantive rank.

(2) The Minister may, in accordance with regulations made by him, promote any officer holding a substantive rank or an acting rank to a higher acting rank.

(3) An officer promoted to a higher acting rank shall at any time thereafter, on a direction to that effect being given by the Minister, revert to his substantive rank or, if so directed, to an acting rank higher than his substantive rank.