Indiana Code Title 20. Education § 20-28-10-11

Sec. 11. (a) Not later than sixty (60) days after:

a teacher who has received a leave of absence for defense service shall return to the school corporation for reinstatement.  The school corporation shall then reinstate the teacher.

(b) If the teacher is unable to return for reinstatement within the sixty (60) day period for any reason arising from mental or physical disability, the teacher has sixty (60) days after the date of removal of the disability to apply for reinstatement.

(c) On reinstatement or on written resignation submitted to the school corporation, the teacher's leave of absence and defense service is considered terminated.