U.S. Code / Title 5 — Government Organization and… / Part III—Employees / Subpart B—Employment and Retention / Chapter 35—Retention Preference, Voluntary Separation Incentive…Title 5SubchapterSubchapter I—Retention PreferenceContents§ 3501. Definitions; application§ 3502. Order of retention§ 3503. Transfer of functions§ 3504. Preference eligibles; retention; physical qualifications; waiver