Subject to regulation 3(2), no person shall use, install or modify, or permit the use, installation or modification, of any lift, escalator or passenger conveyor unless-
(a) such lift, escalator or passenger conveyor has been designed and constructed or modified in accordance with the relevant standard incorporated for this purpose into these Regulations under section 44 of the Act; and (b) the requirements of the National Building Regulations, if applicable, have been complied with.