22.—(1) A revocation or variation under regulation 21(2) will take effect, subject to paragraph (2), on the date on which notice is served under regulation 21(12).
(2) Where more than one notice is served under regulation 21(12) in respect of the same revocation or variation and those notices are served on different days, the revocation or variation will take effect on the date on which the last of them is served.
(3) Where a permission has been suspended or a variation has taken effect temporarily, in the circumstances described in regulation 21(7), but the Welsh Ministers' final decision under regulation 21(11) is not to revoke the permission or vary it permanently, the permission will again have effect, or have effect on the terms effective prior to the temporary variation, as the case may be, from the date of the notice served under regulation 21(12).
(4) In relation to a permission which has been suspended under regulation 21(7) or 21(8), which continues in effect under regulation 21(9)(a) or which the Welsh Ministers have decided under regulation 21(11) not to revoke —
(a)any period specified in the permission for the taking of any action which expires after the date on which the permission was suspended, will be treated as extended by a period equal to that during which the permission was suspended; and
(b)where a permission requires anything to be done by a specified date which falls after the date upon which the permission was suspended, that specified date will be postponed by a period equal to that during which the permission was suspended.
(5) In relation to a permission which was varied temporarily under regulation 21(8) but which the Welsh Ministers have decided under regulation 21(11) not to vary permanently—
(a)any period specified in the permission for the taking of any action which expires after the date on which the permission was varied temporarily under paragraph (b) will, if the action relates to matters which are affected by the temporary variation, be treated as extended by a period equal to that during which the permission had effect as varied; and
(b)where a permission requires any action to be taken by a specified date which falls after the date on which the permission was varied temporarily, the specified date will, if the action relates to matters which are affected by the temporary variation, be postponed by a period equal to that during which the permission had effect as varied.
(6) The revocation or variation of a permission under regulation 21(2), the suspension of a permission under regulation 21(7) or (8), or the temporary variation of a permission under regulation 21(7), will not affect anything done under the permission before the date on which the permission was revoked, varied, suspended or temporarily varied, as the case may be.