For the purposes of articles 6 and 7 of the Post Office (Rateable Values) Order 197210 in relation to any year beginning on and after the appointed day the changes of areas made by the order shall be deemed to have been operative at all material times.

Where the Commissioners of Inland Revenue have notified the amounts of rateable values under paragraph (1) of the said article 6, they shall as soon as may be after the coming into operation of the order notify to the rating authorities any variation of such amounts which is necessary, and the valuation officer in his action under paragraph (4) of such article shall proceed accordingly.