For the purposes of section 14 of the Water Act 1973 (under which, among other things, functions of local authorities with respect to sewerage and sewage disposal, including certain functions under Part XII of the Public Health Act 1936, were transferred to water authorities), section 306 of the said Act of 1936 (which related to the compulsory purchase of land was contained in the said Part XII) shall have effect from 31st March 1974 as if that section had not been repealed by the Local Government Act 1972.