10. What is the time frame within which a person has to report back to work or apply for reinstatement?
For periods of service of up to 30 consecutive days, the person must report back to work for the first full regularly scheduled work period on the first full calendar day following the completion of the period of service and safe transportation home, plus an 8-hour period for rest. If reporting back within this deadline is "impossible or unreasonable" through no fault of the employee, he or she must report back as soon as possible after the expiration of the 8-hour period.
After a period of service of 31-180 days, the person must submit a written or verbal application for reemployment with the employer not later than 14 days after the completion of the period of service. If submitting the application within 14 days is impossible or unreasonable through no fault of the employee, he or she must submit the application as soon as possible thereafter.
After a period of service of 181 days or more, the person must submit an application for reemployment not later than 90 days after completion of the period of service. These deadlines to report to work or apply for reemployment can be extended up to two years to accommodate a period during which a person was hospitalized for or convalescing from an injury or illness that occurred or was aggravated during a period of military service. (Section 4312)
In either case, the person does not automatically forfeit the right to reemployment, but will be "subject to the conduct rules, established policy, and general practices of the employer pertaining to explanations and discipline with respect to absence from scheduled work." (Section 4312).
source