(1)(a)National Power may by means of the works abstract from the river such quantities of water as may be required for cooling purposes.
(b)National Power may by means of the works discharge into the river any water so abstracted.
(2)(a)PowerGen may by means of the works abstract from the river such quantities of water as may be required for cooling purposes.
(b)PowerGen may by means of the works discharge into the river any water so abstracted.
(3)Nothing in this section shall exempt the appropriate company from the provisions of Chapter I of Part III of the [1989 c. 15.] Water Act 1989 or Part IV of the [1963 c. 38.] Water Resources Act 1963 and National Power and PowerGen shall each be deemed to be entitled to make an application for a licence under the said Act of 1963 by virtue of section 27 of that Act.