A simplified planning zone scheme shall take effect on the date of its adoption or approval and shall cease to have effect at the end of the period of ten years beginning with that date.

Upon the scheme’s ceasing to have effect planning permission under the scheme shall also cease to have effect except in a case where the development authorised by it has been begun.

The provisions of section 41(2) to (6) of this Act (which provide for the termination of planning permission if the completion of development is unreasonably delayed) apply to planning permission under a simplified planning zone scheme where development has been begun but not completed by the time the area ceases to be a simplified planning zone.

The provisions of section 40(1) to (3) of this Act apply in determining for the purposes of this section when development shall be taken to be begun.