Regulation 4 Commutation of obligations
Any notice, given by a river authority under section 9(2) of the Act, of a proposal to commute an obligation to which that section applies shall be in writing, and the provisions of section 120 of the Water Resources Act 1963 (which relates to the service of documents) shall have effect in relation to the giving of that notice as they have effect in relation to the giving of a document required to be given by that Act.