Article 4 Condition as to employment and capacity

a person is serving Her Majesty or is otherwise employed being a person to whom either the provisions of the Naval Discipline Act 1957^f1 are applied by section 118(2) of that Act or to whom the provisions of Part 2 of the Army Act 1955^f2 are applied by section 209(2) of that Act or to whom the provisions of Part 2 of the Air Force Act 1955^f3 are applied by section 209(2) of that Act, and

is involved in the performance of any of the following functions, namely, administrative, executive, judicial, clerical, typing, duplicating, machine operating, paper keeping, managerial, professional, instructional, scientific, experimental, technical, industrial or labouring functions.