5 U.S.C. § 3316
Preference eligibles; reinstatement
On request of an appointing authority, a preference eligible who has resigned or who has been dismissed or furloughed may be certified for, and appointed to, a position for which he is eligible in the competitive service, an Executive agency, or the government of the District of Columbia.
( Pub. L. 89–554 , Sept. 6, 1966 , 80 Stat. 421 .)