3.—(1) Each certificate of entitlement shall be issued for not more than one motor vehicle which may fall within any of the following categories:
(a)
category A for cars having a cylinder capacity not exceeding 1,600 cubic centimetres and taxis;
(b)
category B for cars having a cylinder capacity exceeding 1,600 cubic centimetres;
(c)
the category comprising goods vehicles, cement mixers and buses;
(d)
the motor cycles category comprising all motor cycles;
(e)
the open category comprising any motor vehicles referred to in paragraphs (a) to (d); and
(f)
the off-peak cars category comprising motor vehicles which shall be registered as off-peak cars under the Road Traffic (Motor Vehicles, Registration and Licensing) Rules (R 5), except that no certificate of entitlement shall be issued under this sub-paragraph after 30th September 1994.
(2) For the purposes of paragraph (1)(e), "motor vehicles" shall include any motor car which, on or after 1st October 1994, is intended to be registered as an off-peak car under the Road Traffic (Motor Vehicles, Registration and Licensing) Rules.