16. (1) The validity of any order made or action taken after the commencement of this Act by the Governor-General in Council or by a local government which would have been within the powers of the Governor-General in Council or of such local government if this Act had not been passed, shall not be open to question in any legal proceedings on the ground that by reason of any provision of this Act or of any rule made by virtue of any such provision such order or action has ceased to be within the powers of the Governor-General in Council or of the government concerned.
(2) Nothing in this Act, or in any rule made thereunder, shall be construed as diminishing in any respect the powers of the Indian legislature as laid down in section sixty-five of the principal Act, and the validity of any Act of the Indian legislature or any local legislature shall not be open to question in any legal proceedings on the ground that the Act affects a provincial subject or a central subject, as the case may be, and the validity of any Act made by the governor of a province shall not be so open to question on the ground that it does not relate to a reserved subject.
(3) The validity of any order made or action taken by a governor in council, or by a governor acting with his ministers, shall not be open to question in any legal proceedings on the ground that such order or action relates or does not relate to a transferred subject, or relates to a transferred subject of which the minister is not in charge.