45.—(1) This regulation applies where these Regulations impose a duty on a person to—
(a)make available, give or display an energy performance certificate or a display energy certificate in relation to a building; or
(b)ensure an air-conditioning system is inspected.
(2) It shall be the duty of every person with an interest in, or in occupation of, the building to—
(a)allow such access to any energy assessor appointed by the person referred to in paragraph (1) (“the responsible person”) as is reasonably necessary to inspect the building for the purposes of—
(i)preparing an energy performance certificate;
(ii)preparing a display energy certificate;
(iii)preparing a recommendation report; or
(iv)inspecting an air-conditioning system; and
(b)cooperate with the responsible person so far as is reasonably necessary to enable him to comply with the duty referred to in paragraph (1).