(1) Where any officer, soldier, sailor or airman actually in the service of the 2[Republic] in such capacity is a party to a suit, and cannot obtain leave of absence for the purpose of prosecuting or defending the suit in person, he may authorise any person to sue or defend in his stead.
(2) The authority shall be in writing and shall be signed by the officer, soldier, sailor or airman in the presence of (a) his commanding officer, or the next subordinate officer, if the party is himself the commanding officer, or (b) where the officer, soldier, sailor or airman is serving in military, naval or air force staff employment, the head or other superior officer of the office in which he is employed. Such commanding or other officer shall counter sign the authority, which shall be filed in Court.
(3) When so filed the counter signature shall be sufficient proof that the authority was duly executed, and that the officer, soldier, sailor or airman by whom it was granted could not obtain leave of absence for the purpose of prosecuting or defending the suit in person.
Explanation.-In this Order the expression "commanding officer" means the officer in actual command for the time being of any regiment, corps, ship, detachment or deport to which the officer, soldier, sailor or airman belongs.
Any person authorised by an officer, soldier, sailor or airman to prosecute or defend a suit in his stead may prosecute or defend it in person in the same manner as the officer, soldier, sailor or airman could do if present; or he may appoint a pleader to prosecute or defend the suit on behalf of such officer, soldier, sailor or airman.
Processes served upon any person authorised by an officer, soldier, sailor or airman under rule 1 or upon any pleader appointed as aforesaid by such person shall be as effectual as if they had been served on the party in person.