The following bodies shall cease to exist on 1st April 1974, that is to say—
(a)the Water Resources Board;
(b)the Central Advisory Water Committee;
(c)all river authorities;
(d)the Conservators of the River Thames and the Lee Conservancy Catchment Board;
(e)the Isle of Wight River and Water Authority;
(f)all statutory water undertakers existing immediately before the passing of this Act, except statutory water companies, joint water boards, joint water committees and existing local authorities and other bodies exercising functions not affected by this Act;
(g)all joint sewerage boards and joint committees of sewerage authorities existing immediately before the passing of this Act;
(h)the Water Supply Industry Training Board;
and section 263 of the 1972 Act (continuation of existing joint boards and committees) shall not apply to bodies which cease to exist by virtue of this section.