This Part of BS AU 209 specifies requirements for the performance of locking systems fitted to all closures through which access may be gained to the driver's compartment of goods vehicles. Goods carrying compartments which are not accessible from the driver's compartment, are the subject of Part 8 of this British Standard.
This Part of BS AU 209 does not apply to category N.1 (gross vehicle mass of up to 3.5 t) vehicles that have been derived from passenger cars.