The proprietor of approved premises must not, without reasonable excuse, refuse to inspect or test a vehicle (or arrange for it to be inspected or tested) if—
(a) the proprietor is asked by the driver of the vehicle to inspect or test the vehicle, to decide whether the vehicle, and its parts and equipment, comply with the applicable vehicle standards; and
(b) the vehicle is a vehicle that may be inspected or tested under these regulations on the premises; and
(c) the proprietor of the premises is an authorised examiner, or an authorised examiner is employed at the premises, who is authorised under these regulations to inspect or test the vehicle.