2.—(1) An enforcement authority shall have power, for the purpose of ascertaining whether any equipment complies with the requirements of regulation 7 to make, or to authorise an officer of the authority to make, any purchase of equipment.
(2) Where—
(a)any equipment purchased under this paragraph by or on behalf of any enforcement authority is submitted to a test; and
(b)the test leads to—
(i)the bringing of proceedings for an offence under regulation 18 in relation to the equipment or the forfeiture of equipment of the same description under paragraph 13 or 14 below; or
(ii)the serving of a suspension notice in respect of any equipment; and
(c)the authority is requested to do so and it is practicable for the authority to comply with the request,
the authority shall allow the person from whom the equipment was purchased or any person who is a party to the proceedings or has an interest in any equipment to which the notice relates to have the equipment tested.