14 U.S.C. § 2111
(a) Before convening a selection board to recommend officers for promotion to any grade above lieutenant (junior grade) and below rear admiral (lower half), the Secretary shall establish a promotion zone for the grade to be considered. The promotion zone for each grade shall consist of the most senior officers of that grade on the active duty promotion list who are eligible for consideration for promotion to the next higher grade and who have not previously been placed in a promotion zone for selection for promotion to the next higher grade. The number of officers in each zone shall be determined after considering—
However, such number of officers shall not exceed the number to be selected for promotion divided by one-half.
(Added Pub. L. 88–130, § 1(10)(C), , 77 Stat. 179, § 256; amended Pub. L. 89–444, § 1(16), , 80 Stat. 196; Pub. L. 97–417, § 2(3), , 96 Stat. 2085; Pub. L. 99–145, title V, § 514(c)(1), , 99 Stat. 629; Pub. L. 99–661, div. A, title XIII, § 1343(c), , 100 Stat. 3995; renumbered § 2111 and amended Pub. L. 115–282, title I, § 112(b), title III, § 312, , 132 Stat. 4216, 4249.)
2018—Pub. L. 115–282, § 112(b), renumbered section 256 of this title as this section.
Subsec. (a). Pub. L. 115–282, § 312, substituted “one-half.” for “six-tenths.” in concluding provisions.
1986—Subsec. (b). Pub. L. 99–661 substituted “rear admiral (lower half)” for “commodore”.
1985—Subsec. (a). Pub. L. 99–145 substituted “rear admiral (lower half)” for “commodore”.
1983—Subsecs. (a), (b). Pub. L. 97–417 substituted “commodore” for “rear admiral”.
1966—Subsec. (a). Pub. L. 89–444 limited promotion zone by requiring that list of officers under consideration be officers eligible for consideration for promotion to next higher grade.