5 CFR § 353.205 - Return to duty and application for reemployment.
Periods allowed for return to duty are based on the length of time the person was performing service in the uniformed services, as follows:
(a) An employee whose uniformed service was for less than 31 days, or who was absent for the purpose of an examination to determine fitness for the uniformed services, is required to report back to work not later than the beginning of the first regularly scheduled work day on the first full calendar day following completion of the period of service and the expiration of 8 hours after a period allowing for the safe transportation of the employee from the place of service to the employee's residence, or as soon as possible after the expiration of the 8-hour period if reporting within the above period is impossible or unreasonable through no fault of the employee.
(b) If the service was for more than 30 but less than 181 days, the employee must submit an application for reemployment with the agency not later than 14 days after completing the period of service. (If submitting the application is impossible or unreasonable through no fault of the individual, it must be submitted the next full calendar day when it becomes possible to do so.)
(c) If the period of service was for more than 180 days, the employee must submit an application for reemployment not later than 90 days after completing the period of service.
(d) An employee who is hospitalized or convalescing from an injury or illness incurred in, or aggravated during uniformed service is required to report for duty at the end of the period that is necessary for the person to recover, based on the length of service as discussed in paragraphs (a), (b), and (c) of this section, except that the period of recovery may not exceed 2 years (extended by the minimum time required to accommodate circumstances beyond the employee's control which make reporting within the period specified impossible or unreasonable).
(e) A person who does not report within the time limits specified does not automatically forfeit restoration rights, but, rather, is subject to whatever policy and disciplinary action the agency would normally apply for a similar absence without authorization.