10 U.S.C. § 621
Under regulations prescribed by the Secretary of Defense, the Secretary of each military department shall establish competitive categories for promotion. Each officer whose name appears on an active-duty list shall be carried in a competitive category of officers. Officers in the same competitive category shall compete among themselves for promotion.
(Added Pub. L. 96–513, title I, § 105, , 94 Stat. 2856.)
Section effective , but the authority to prescribe regulations under this section effective on , see section 701 of Pub. L. 96–513, set out as an Effective Date of 1980 Amendment note under section 101 of this title.