Article 21 Witness summons
Where any person, whether subject to the Act or not, is required to give evidence at a hearing for directions or at a court-martial, the court administration officer may summon the witness by issuing a witness summons in the form set out in Schedule 2 to these Rules.
As soon as is practicable after the accused has been notified that he is to be tried by court-martial, the court administration officer shall serve notice in writing on the accused that any person whom he requires to give evidence may be summoned on his behalf by the court administration officer.
If the accused requires the court administration officer to summon a witness, the accused shall provide to the court administration officer sufficient information in sufficient time to enable a summons to be served.
A witness summons shall be served on a witness—
by delivering it to him personally;
by leaving it for him with a person at the witness’s usual place of abode;
by post in a letter addressed to him at his last known or usual place of abode; or
where the witness is subject to military law, air force law or the Act, through his commanding officer.