(b)
Any employee who is on a flexible schedule program under
section 6122 of this title and who is no longer subject to such a program shall be paid at such employee’s then current rate of basic pay for—
(1) in the case of a full-time employee, not more than 24 credit hours accumulated by such employee, or
(2) in the case of a part-time employee, the number of credit hours (not in excess of one-fourth of the hours in such employee’s biweekly basic work requirement) accumulated by such employee.