Any person subject to this Act who, having been duly sworn or affirmed before any Security Guard Court, or before any officer competent under this Act to administer oath or affirmation or before a Court of inquiry constituted under this Act, makes any statement which is false, and which he either knows or believes to be false or does not believe to be true, shall, on conviction by a Security Guard Court, be liable to suffer imprisonment for a term which may extend to seven years or such less punishment as is in this Act mentioned.