(a) Under regulations prescribed under this chapter a person subject to this chapter who is on active state duty and who is accused of an offense against civil authority may be delivered, on request, to the civil authority for trial.
(b) If delivery under this section is made to a civil authority of a person undergoing sentence of a court-martial, the delivery, if followed by conviction in a civil tribunal, interrupts the execution of the sentence of the court-martial, and the offender, after having answered to the civil authorities for the offense, on the request of competent military authority, shall be returned to military custody for the completion of the sentence.