In this Part of this Act:—

• “air-force establishment” means an air-force prison or any other establishment under the control of the Secretary of State where persons may be required to serve air-force sentences of imprisonment or detention;

• “air-force prison” means separate premises under the control of the Secretary of State and primarily allocated for persons serving air-force sentences of imprisonment;

• references to an air-force sentence of imprisonment are references to a sentence of imprisonment passed by court-martial;

• references to an air-force sentence of detention are references to a sentence of detention passed by a court-martial or awarded by the offender’s commanding officer;

• “civil prison” means a prison in the United Kingdom in which a person sentenced by a civil court to imprisonment can for the time being be confined;

• “convening officer”, in relation to a court-martial, means the officer convening that court-martial and includes his successor or any person for the time being exercising his or his successor’s functions;

• “prescribed” means prescribed by Rules of Procedure.

For the purposes of subsection (2) of section eighty-seven and subsection (2) of section eighty-eight of this Act, and of the proviso to subsection (3) of section ninety thereof, any period of service on a commission in the Home Guard shall be disregarded.

References in this Part of this Act to warrant officers do not include references to acting warrant officers.

References in this Part of this Act to non-commissioned officers include references to acting non-commissioned officers and also to acting warrant officers.