Sections 6 to 11 of this Act shall, in their application to persons subject to service discipline, apply outside as well as within Great Britain and have effect as if—
In relation to persons for the time being subject to service discipline the power to arrest conferred on a constable by section 5(5) of this Act shall also be exercisable by a member of the provost staff and shall be so exercisable outside as well as within Great Britain.
In this section—
" corresponding service offence ", in relation to an offence under any enactment, means an offence under section 42 of the Naval Discipline Act 1957 or an offence against section 70 of the Army Act 1955 or section 70 of the Air Force Act 1955 committed by an act or omission which is punishable under that enactment or would be so punishable if committed in Great Britain ;
" member of the provost staff " means a provost officer or any person legally exercising authority under or on behalf of a provost officer;
" persons subject to service discipline " means persons subject to the said Act of 1957, to military law or to air force law and other persons to whom section 42 of the said Act of 1957 or section 70 of either of the said Acts of 1955 for the time being applies;
" provost officer " means a person who is a provost officer within the meaning of the said Act of 1957 or either of the said Acts of 1955.