5 C.F.R. § 550.1202
In this subpart-Accumulated and accrued annual leave means any annual leave accumulated and accrued, as these terms are defined in § 630.201 of this chapter, plus any annual leave credited to an employee under 5 U.S.C. 6304(c) and § 630.301(d) of this chapter and any annual leave restored under 5 U.S.C. 6304(d) . Accumulated and accrued annual leave does not include annual leave received by a leave recipient under the voluntary leave transfer or leave bank programs established under subchapters III and IV of chapter 63 of title 5, United States Code, or annual leave advanced to an employee under 5 U.S.C. 6302(d) .
Administrative workweek has the meaning given that term in § 610.102 of this chapter.
Agency means-
Employee has the meaning given that term in 5 U.S.C. 2105 .
Lump-sum payment means a final payment to an employee for accumulated and accrued annual leave.
Mixed tour of duty means a condition of employment for positions in which a fluctuating workload requires an employee to work full-time or part-time for a limited portion of the year and on an intermittent basis for the remainder of the year.
Rate of basic pay means the rate of pay fixed by law or administrative action for the position held by an employee, including any applicable locality payment under 5 CFR part 531, subpart F; special rate supplement under 5 CFR part 530, subpart C; or similar payment or supplement under other legal authority, before any deductions and exclusive of additional pay of any other kind.
Transfer means the movement of an employee to another position without a break in service of 1 workday or more.
5 C.F.R. §550.1202