45 CFR § 1176.3 - Criteria.
Positions becoming vacant, unless excepted as provided by § 1176.8, will be reviewed to determine the feasibility of converting them to part-time. Among the criteria which may be used when conducting this review are:
(a) Mission requirements.
(c) Employment ceilings and budgetary considerations.
(d) Availability of qualified applicants willing to work part-time.