When a person is held for trial by general court-martial the commanding officer shall, within eight days after the accused is ordered into arrest or confinement, if practicable, forward the charges directly to the person exercising general court-martial jurisdiction, together with the investigation and allied papers. If that is not practicable, the commanding officer shall report in writing to the adjutant general the reasons for delay. [C66, 71, 73, 75, 77, 79, 81, §29B.34 ; 82 Acts, ch 1042, §18 ]