The Merchant Shipping (Weighing of Goods Vehicles and other Cargo) Regulations 1988
These Regulations apply to United Kingdom Class II and II(A) ro/ro passenger ships, and require the weighing of all road vehicles (except buses) and all non-vehicular items of cargo exceeding, in each case, 7.5 tonnes for all voyages on which passengers are carried. Subject to certain exceptions, cargo must be weighed within the port at which the ship is to be loaded, and the weighing machine must be certified, and operated in accordance with conditions laid down, by an inspector of weights and measures.