33 U.S. Code § 3023 - Promotion of ensigns to grade of lieutenant (junior grade)
(a) In general
An officer in the permanent grade of ensign shall be promoted to and appointed in the grade of lieutenant (junior grade) upon completion of three years of service. The authorized number of officers in the grade of lieutenant (junior grade) shall be temporarily increased as necessary to authorize such appointment.
Source(Pub. L. 107–372, title II, § 223,Dec. 19, 2002, 116 Stat. 3085.)
Provisions similar to those in this section were contained in section 853e of this title prior to repeal by Pub. L. 107–372.
Delegation of Functions