7.—(1) An enforcement authority shall have power, for the purposes of ascertaining whether any provision of these Regulations has been contravened, to purchase, or to authorise an officer of the authority to purchase, any regulated appliance.
(2) Where—
(a)a regulated appliance purchased under this paragraph by or on behalf of an enforcement authority is submitted to a test;
(b)the test leads to the bringing of proceedings in respect of an offence under these Regulations; 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 regulated appliance was purchased or any person who is a party to the proceedings or has an interest in the appliance to have the appliance tested.
(3) A test of a regulated appliance purchased under this paragraph, or seized and detained under paragraph 8 (power to enter premises and inspect, seize and detain appliances etc), shall be carried out in accordance with the test procedures of the harmonised standards.