The only condition is that the Governor General must think the proposed regulation to be desirable "for the more effectual prosecution of the war, or the more effectual defense of the Commonwealth or of the realm." If he do so think, the regulation is congeable, though it does not deal with the raising, maintenance, or use of any naval or military forces, or with the training or equipment of such forces, or with the supply of any naval or military material, or with any matter immediately ancillary to any of these things, or incidental to the execution of any power exercised in respect to them within the meaning of § 51 (XXXIX.) of the Constitution.