The power of the Minister of Pensions under section fourteen of the War Pensions (Administrative Provisions) Act, 1918, to require information from employers and others for the purpose of ascertaining the pre-war earnings of a disabled person, shall be extended so as to include power to require information for the purpose of ascertaining the earning capacity of any such person and for ascertaining the pre-war earnings of a deceased person, and it shall be the duty of employers, and of any other person having knowledge thereof, to furnish any such information, and that section shall have effect accordingly.