Military and Veterans Code § 461

Commissions and subpenas may be issued by the president or the trial counsel of the court, both before and after being sworn, for witnesses whose attendance or testimony before such court may be necessary in behalf of the prosecution, and upon application in behalf of any person to be tried by such court, either the president or the trial counsel may direct the commanding officer of any organization to cause such subpena to be served on any member of his command.