1. For the purposes of regulation 42 and of this Schedule the following expressions have the meanings hereby respectively assigned to them—
“authorised use” means the use, authorised under regulation 42, of a motor vehicle owned by the member concerned for the purposes of his duties as a member, and “period of authorised use” means the period during which such use is authorised;
“cylinder capacity” means the cylinder capacity of the engine of a vehicle calculated in accordance with regulations under paragraph 2(4) of Schedule 1 to the Vehicle Excise and Registration Act 1994(1);
“motor bicycle” means a mechanically propelled bicycle (including a motor scooter, a bicycle with an attachment for propelling it by mechanical power and a mechanically propelled bicycle used for drawing a sidecar);
“motor car” means a mechanically propelled vehicle other than a motor bicycle and, accordingly, includes a mechanically propelled tricycle;
“year” means a period of twelve months beginning on such date as may be determined by the Police Authority;
and a reference to a motor vehicle owned by a member is a reference to such a vehicle kept and used by him.