Execution of orders, instruments, etc

Save as expressly provided by any regulations, any order, determination, direction or appointment required or authorised to be made under this Act by any military officer or authority may be signified under the hand of any officer authorised in that behalf, and any instrument signifying such an order, determination, direction or appointment and purporting to be signed by an officer stated therein to be so authorised shall, 107 unless the contrary is proved, be deemed to be signed by an officer so authorised.