Subject to the provisions of the next following section, the provisions of this Part of this Act relating to appeals to the Court against convictions by courts-martial and the provisions of this Part of this Act relating to references to the Court, in cases of convictions by courts-martial, of the findings of the courts-martial—
(a)shall have effect in relation to convictions by naval courts martial on or after such date as His Majesty may by Order in Council appoint in relation to such courts-martial ;
(b)shall have effect in relation to convictions by army or air force courts-martial the findings whereof are promulgated on or after such date as His Majesty may by Order in Council appoint in relation to such courts-martial.