An authorised examiner must not, for this regulation—
(a) inspect or test a vehicle included in a class of vehicles that is not mentioned in his or her certificate of authorisation; or
(b) inspect or test a vehicle other than at approved premises; or
(c) without reasonable excuse, refuse to inspect or test a vehicle included in a class of vehicles mentioned in his or her certificate of authorisation; or
(d) certify in a certificate issued under section 146 that a vehicle, or any part or equipment of the vehicle, complies with the applicable vehicle standards unless—
(i) the examiner has inspected or tested the vehicle, part or equipment of the vehicle; and
(ii) the vehicle, part or equipment of the vehicle, complies with the standards.