10 U.S.C. § 1169
Regular enlisted members: limitations on discharge
No regular enlisted member of an armed force may be discharged before his term of service expires, except—
(1)
as prescribed by the Secretary concerned;
(2)
by sentence of a general or special court martial; or
(3)
as otherwise provided by law.
(Added Pub. L. 90–235, § 3(a)(1)(A) , Jan. 2, 1968 , 81 Stat. 757 .)