bring again into force any provision of the Civil Defence Acts 1937 and 1939, the operation of which is suspended under the M2Civil Defence (Suspension of Powers) Act 1945, and, in particular, and without prejudice to the generality of the preceding words, any provision of those Acts relating to factories, mines, commercial buildings or public utility undertakings, the operation of which was suspended as aforesaid;

direct that any provision of those Acts which was spent before the passing of the M3Civil Defence (Suspension of Powers) Act 1945, and, in particular, and without prejudice to the generality of the preceding words, any provision of those Acts relating to notices to be given and grants to be made in the case of factories, mines, commercial buildings or public utility undertakings which was spent as aforesaid, shall again come into force;

make, in any of the provisions of the said Acts, whether in force by virtue of regulations made under paragraph (a) or paragraph (b) of this subsection or in force otherwise, any such amendments as appear to him to be required owing to the passage of time or to be necessary or expedient to adapt them to any changes which have occurred since the passing of the said Acts either in the law or in the relevant circumstances, including, in particular, any actual or apprehended developments in the forms of warfare;

repeal any of the provisions of the said Acts and, if it appears to him necessary or expedient so to do having regard to any such changes as aforesaid, substitute any comparable provision for any provision so repealed; and

amend or extend any of the provisions of the M4Rating and Valuation (Air Raid Works) Act 1938, or the M5Rating and Valuation (Air Raid Works) (Scotland) Act 1938,