http://www.legislation.gov.uk/id/ukpga/1963/33

http://www.legislation.gov.uk/ukpga/1963/33/section/20

London Government Act 1963

An Act to make provision with respect to local government and the functions of local authorities in the metropolitan area; to assimilate certain provisions of the Local Government Act 1933 to provisions for corresponding purposes contained in the London Government Act 1939; to make an adjustment of the metropolitan police district; and for connected purposes.