5 U.S. Code § 6336 - Restoration of transferred leave
(1) The Office of Personnel Management shall establish procedures under which, except as provided in paragraph (2), any transferred leave remaining to the credit of a leave recipient when the medical emergency affecting the leave recipient terminates shall be restored on a prorated basis by transfer to the appropriate accounts of the respective leave donors.
(2) Nothing in paragraph (1) shall require the restoration of leave to a leave donor—
(A) if the amount of leave which would be restored to such donor would be less than 1 hour or any other shorter period of time which the Office may by regulation prescribe;
(B) if such donor retires, dies, or is otherwise separated from service, before the date on which such restoration would otherwise be made; or
(b) At the election of the leave donor, transferred annual leave restored to such leave donor under subsection (a) may be restored by—
(2) crediting such leave to the leave donor’s annual leave account, effective as of the first day of the first leave year beginning after the date of the election; or
(c) The Office shall prescribe regulations under which this section shall be applied in the case of an employee who is paid other than on the basis of biweekly pay periods.