19All local enactments, and (under whatever Act made) all regulations, rules and orders, which are in force immediately before the appointed day and then applicable to the Gas Council or an Area Board shall have effect as from that day as if—
(a)for references therein to the Gas Council or an Area Board there were substituted references to the Corporation, and
(b)for any reference therein (however worded, and whether expressed or implied) to the business, or any part of the business, of the Gas Council or an Area Board, or to the area of supply of an Area Board or any part thereof, there were substituted a reference to the corresponding part of the Corporation's business or, as the case may be, to the corresponding area supplied by the Corporation,
and shall also have effect, as from such date as may be prescribed (which may be prior to the making of the regulations but not to the appointed day), with such other adaptations and modifications (if any) as may be prescribed, being adaptations or modifications required in consequence of the provisions of this Act.
20Any public general Act passed before 1st May 1949 (the vesting date for the purposes of the [1948 c. 67.] Gas Act 1948) and, by virtue of section 56(3) of that Act, to be construed immediately before the appointed day as referring to an Area Board or the business of an Area Board shall be construed as from the appointed day as referring to the Corporation or, as the case may be, the corresponding part of the Corporation's business.
21For the purpose of securing, so far as is reasonably practicable, a uniform statutory code applicable throughout any part of Great Britain, the Secretary of State may by order provide for the amendment or repeal of any local enactment, regulation or order to which paragraph 19 above applies, or for its extension to any area specified in the order, and for such matters consequential on or incidental to any such amendment, repeal or extension for which the Secretary of State considers it necessary or expedient to provide.