28. For Article 16 of the Enterprise Zones (Northern Ireland) Order 1981(1) there shall be substituted the following Article—
16.—(1) Modifications to a scheme do not affect planning permission under the scheme in any case where the development authorised by it has been begun before the effective date of modification.
(2) Upon an area ceasing to be an enterprise zone planning permission under the scheme shall cease to have effect except in a case where the development authorised by it has been begun.
(3) Paragraphs (2) to (6) of Article 28 of the Planning (Northern Ireland) Order 1972 (termination of planning permission if completion of development is unreasonably delayed) shall apply to planning permission under the scheme where development has been begun but not completed by the time the area ceases to be an enterprise zone.
(4) Article 27(1) of that Order shall apply in determining for the purposes of this Article when development shall be taken to be begun.”.