London Government Act 1963

5 (1) If it appears to the Secretary of State that any electoral area in Greater London for which councillors are elected to a London borough council will not be ascertained in time for the registers of parliamentary and local government electors for any constituency or local government area comprising that electoral area to be published in compliance with regulations under section 42 of the Representation of the People Act 1949 by 15th February 1964 (being the time required by section 1 of the Electoral Registers Act 1949), he may by order provide for the registers for that constituency or local government area to be published by such later date in 1964 as may be specified in the order; and subsection (6) of the said section 1 (which provides for continuing old registers in force where the new register is not published in the time required by that section and for determining the qualifying date for elections held on the old register) shall apply accordingly where those registers are not published before 15th February 1964.

(2) Any order under this paragraph shall be subject to annulment in pursuance of a resolution of either House of Parliament.