(1)No provision contained in section 2 or section 5 of this Act shall be construed as authorising on the part of a local authority any act or omission which, apart from that provision, would be actionable at the suit of any person on any grounds other than a limitation imposed by law on the capacity of the local authority by virtue of its constitution.
(2)None of the following sections of this Act, that is to say sections 2, 5 and 6, shall be treated as an alternative enactment within the meaning of section 79 of the Town and Country Planning Act 1962 (which empowers local authorities to develop land acquired by them under that Act for planning purposes where the power to do so does not exist by virtue of, and cannot be conferred under, an alternative enactment).