(1) At any time which is expedient, the Head of the Physical Planning and Development Division may carry out a review of an approved plan and submit to the Minister a report on that review together with proposals for any alterations or additions to the plan which appear to be appropriate.
(2) Without prejudice to the generality of subsection (1), the Head of the Physical Planning and Development Division shall at least once in every 5 years after the date on which a physical plan comes into operation review and report on that plan as aforesaid.
(3) For the avoidance of doubt it is hereby declared that any proposal for alternations or additions to an approved plan made under this section shall be made subject mutatis mutandis to all the requirements related to the preparation and approval of a physical plan set out in sections 12 and 13.