(a)a person who, being an officer within the meaning of [* * *] [The words "the Army Act or" were omitted by the A.O. 1950.] the Army Act, 1950 (46 of 1950 is commissioned and in pay as an officer doing military or air force duty with [* * *] [The words "His Majesty's" were omitted by the A.O. 1950.] military or air forces, or is an officer doing such duty in any arm, branch or part of those forces; or
