N.D. Cent. Code § 37-04-18
The officers on the retired list are subject to detail for duty only by orders from the commander in chief, who shall cause to be issued such orders as the commander in chief deems necessary detailing them for duty upon boards of officers for military purposes, courts-martial, and courts of inquiry, and for such other military duties as in the commander in chief's judgment may be advisable. If officers on the retired list are detailed for active duty other than upon boards of officers, courts-martial, and courts of inquiry, they are entitled only to the rank which properly belongs to the office, the duties of which they are detailed to perform. When the duty ends, or the detail is canceled, the officer shall return again to the retired list with the officer's former retired rank.
N.D.C.C. § 37-04-18