Pub. L. 83-773, tit. V, sec. 506

Sec. 506. (a) A Reserve officer in the grade of second lieutenant may not be promoted to, or federally recognized in, the next higher grade until he has completed three years of promotion service in the grade of second lieutenant. (b) A Reserve officer in a grade above second lieutenant, other than an adjutant general or assistant adjutant general of a State, a Territory, or the District of Columbia who holds his grade as a Reserve officer solely because of his position as an adjutant general or an assistant adjutant general, may not be considered by a selection board for promotion, or examined by a Federal recognition board for Federal 68 Stat. 1174 recognition in the next higher grade, until he has completed the following minimum number of years of promotion service in grade: Grade Minimum number of years of promotion Service in that grade First lieutenant 2 Captain 4 Major 4 Lieutenant colonel 3 Colonel 2 Brigadier general 1