1.—In this Act—

“the Act of 1939” means the Offences against the State Act 1939;

“the Defence Forces” means the Permanent Defence Force within the meaning of the Defence Act 1954;

“prison” includes Saint Patrick's Institution, any place provided under section 2 of the Prisons Act 1970, any place in which persons are kept in military custody pursuant to section 2 of the Prisons Act 1972, or any place specified to be used as a prison under section 3 of that Act, and “governor” and “prison officer” shall be construed accordingly;

“unlawful organisation” means an organisation which is an unlawful organisation within the meaning and for the purposes of the Act of 1939.