Subsection (1) of section thirteen applies (subject to the provisions of that section) to the carrying out of development whether before or after the commencement of this Act, except that it does not apply to development carried out on or before the appointed day.

In sections fifteen and sixteen references to an application for planning permission do not include any application made before the sixteenth day of August, nineteen hundred and fifty-nine.

Where by virtue of the proviso to subsection (3) of section one of the Town and Country Planning (Amendment) Act, 1951 (which related to works for making good war damage which were begun during the period from the appointed day to the thirteenth day of December, nineteen hundred and fifty) any works were treated, immediately before the commencement of this Act, as if planning permission had been granted unconditionally in respect thereof, those works shall be treated for the purposes of this Act as if planning permission had been so granted in respect thereof.