10 U.S.C. § 12108
Each reserve enlisted member of the Army, Navy, Air Force, or Marine Corps who is in an active status and has reached the maximum years of service or age prescribed by the Secretary concerned shall—
(Added Pub. L. 107–107, div. A, title V, § 517(f)(1), , 115 Stat. 1095.)
Section effective on the first day of the first month that begins more than 180 days after , see section 517(g) of Pub. L. 107–107, set out as an Effective Date of 2001 Amendment note under section 10154 of this title.