Registration of vehicle in category of certificate of entitlement
4.—(1) Subject to paragraph (2), any certificate of entitlement that is issued for a motor vehicle within any category of vehicle referred to in rule 3 shall not authorise the registration of any motor vehicle within another category of vehicle.
(2) Any certificate of entitlement that is issued for a vehicle in the open category may be used to register a motor vehicle within any other category of vehicle mentioned in rule 3(1)(a) to (d), except that —
(a)
no such certificate of entitlement may be used to register a taxi if —
(i)
the certificate of entitlement is issued after 1 August 2012; or
(ii)
the certificate of entitlement is issued on or before 1 August 2012 and is transferred on or after 6 August 2012; and
(b)
no such certificate of entitlement may be used to register a motor cycle if the certificate of entitlement is issued on or after 8 May 2017.