10 U.S.C. § 9324

(a) Except as provided in section 1186 of this title , a commissioned officer of the Air Force or the Space Force who has at least 40 years of service computed under section 9326 of this title shall be retired upon his request. (b) Any warrant officer of the Air Force or the Space Force who has at least 40 years of service computed under section 9326(a) of this title shall be retired upon his request.