In this Schedule–
“cm3” means cubic centimetres;
“kg” means kilograms;
“km/h” means kilometres per hour;
“kW” means kilowatts;
“maximum mass” means the technically permissible maximum laden mass as specified by the manufacturer;
“maximum speed” means the speed which the vehicle is incapable, by reason of its construction, of exceeding on the level under its own power when fully laden;
“quadricycle” means a motor vehicle as described in class 7 of this Schedule;
“trailer” means a vehicle drawn by a motor vehicle;
“semi-trailer” means a trailer which is constructed or adapted to form part of an articulated vehicle including (without prejudice to the generality of that) a vehicle which is not itself a motor vehicle but which has some or all of its wheels driven by the drawing vehicle; and
“unladen mass” excludes, in the case of a motor vehicle propelled wholly or partly by electricity, the mass of its batteries.