Part 1 of these Regulations is made in exercise of the powers conferred by sections 85 and 86 of the Merchant Shipping Act 1995 except in respect of its application to Government ships, where the power is provided by section 2(2) of the European Communities Act 1972.
Link: The Merchant Shipping and Fishing Vessels (Health and Safety at Work) (Miscellaneous Amendments) (EU Exit) Regulations 2018
Source: Legislation .gov.uk