5 CFR 842.402 - Definitions.
In this subpart -
(2) An officially established recurring basic work requirement of 80 hours per biweekly pay period (as established for employees with a flexible or compressed work schedule under 5 U.S.C. chapter 61, subchapter II, or similar authority);
(4) A work schedule that is considered to be full-time by express provision of law, including a work schedule established for certain nurses under 38 U.S.C. 7456 or 7456A that is considered by law to be a full-time schedule for all purposes.
Part-time service means any actual service performed on a less than full-time basis, by an individual whose appointment describes a regularly scheduled tour of duty, and any period of time credited as nonpay status time under 5 U.S.C 8411(d), that follows a period of part-time service without any intervening period of actual service other than part-time service.
Proration factor means a fraction expressed as a percentage rounded to the nearest percent. The numerator is the sum of the number of hours the employee actually worked during part-time service; and the denominator is the sum of the number of hours that a full-time employee would be scheduled to work during the same period of service included in the numerator. If an employee has creditable service in addition to part-time service, such service must be included in the numerator and denominator of the fraction.