The Secretary of State, in exercise of the powers conferred on him by sections 15(1), (2), (4)(a), (5), (6)(b) and 82(3)(a) of, and paragraphs 1(1), (2) and (3), 4(1), 12, 15(1) and 16 of Schedule 3 to, the Health and Safety at Work etc. Act 1974() (“the 1974 Act”) and of all other powers enabling him in that behalf and for the purpose of giving effect without modifications to proposals