(b)assume to himself all or any of the powers vested in or exercisable by any Federal body or authority, and any such Proclamation may contain such incidental and consequential provisions as may appear to him to be necessary or desirable for giving effect to the objects of the Proclamation, including provisions for suspending in whole or in part the operation of any provisions of this Act relating to any Federal body or authority :Provided that nothing in this subsection shall authorise the Governor-General to assume to himself any of the powers vested in or exercisable by the Federal Court or to suspend, either in whole or in part, the operation of any provision of this Act relating to the Federal Court.