168. (1) When a person is sentenced by court-martial to suffer death and the sentence has been confirmed, the commanding officer of such person, or such officer as may be prescribed may, if he thinks fit, by warrant in the prescribed form, commit the said person for safe custody in a civil prison pending the execution of the sentence, and may similarly, by warrant in the prescribed form direct that the person so committed be re-delivered into Air Force custody, or that he be released or confined in accordance with any order duly made under this Act setting aside or varying the sentence of death. Any such warrant shall be sufficient authority for the execution of the orders contained therein. (2) A person sentenced under this Act to imprisonment or detention may, until he reaches the prison or detention barracks in which he is to undergo his sentence, be kept in Air Force custody or in Civil custody, or partly in one description of custody and partly in the other, and may, by order of such officer as may be prescribed, from time to time be transferred from one to the other, as occasion may require.