33 U.S. Code § 3029 - Temporary appointments and promotions generally
Temporary appointments in the grade of ensign may be made by the President. Each such temporary appointment terminates at the close of the next regular session of the Congress.
Officers in the permanent grade of ensign may be temporarily promoted to and appointed in the grade of lieutenant (junior grade) by the President whenever vacancies exist in higher grades.
When determined by the Secretary to be in the best interest of the service, officers in any permanent grade may be temporarily promoted one grade by the President. Any such temporary promotion terminates upon the transfer of the officer to a new assignment.
2012—Pub. L. 112–166 struck out “alone” after “President” wherever appearing and, in subsec. (a), struck out “unless the Senate sooner gives its advice and consent to the appointment” before period at end of second sentence.
Amendment by Pub. L. 112–166 effective 60 days after Aug. 10, 2012, and applicable to appointments made on and after that effective date, including any nomination pending in the Senate on that date, see section 6(a) of Pub. L. 112–166, set out as a note under section 113 of Title 6, Domestic Security.