Indiana Code Title 10. Public Safety § 10-16-7-3

Sec. 3. (a) Each detachment and unit in the national guard shall assemble for drill and instruction, including indoor target practice, in accordance with national guard regulations.

(b) In addition, each detachment and unit shall participate in encampments, maneuvers, or other exercises, including outdoor target practice, in accordance with national guard regulations, unless the unit or detachment is excused from participation by the governor.

(c) A commissioned officer and an enlisted person or a member of the Indiana air national guard shall be present and perform all the duties required of the officer, person, or member at each assembly for drill and instruction, encampment, maneuvers, or other exercises, unless regularly excused by competent authority.