Regulation 3 Prescribed types of fuel
A vehicle is propelled by a prescribed type of fuel, or is capable of being propelled by a number of prescribed types of fuel, for the purposes of Condition A if it is—
(a)
propelled by road fuel gas; or
(b)
capable of being propelled by—
(i)
petrol and road fuel gas; or
(ii)
electricity and either petrol or diesel.