(1) In this Schedule "officer" means -
(a) a member of Her Majesty's forces on duty, and
(b) a constable.
(2) In this Schedule "authorised officer" means -
(a) a member of Her Majesty's forces who is on duty and is authorised by a commissioned officer of those forces, and
(b) a constable who is authorised by an officer of the Royal Ulster Constabulary of at least the rank of inspector.
(3) In this Schedule -
(a) explosives, firearms and ammunition, and
(b) anything used or capable of being used in the manufacture of an explosive, a firearm or ammunition,
"scanning receiver" means apparatus (or a part of apparatus) for wireless telegraphy designed or adapted for the purpose of automatically monitoring selected frequencies, or automatically scanning a selected range of frequencies, so as to enable transmissions on any of those frequencies to be detected or intercepted,
"transmitter" means apparatus (or a part of apparatus) for wirele