Indiana Code Title 14. Natural and Cultural Resources § 14-21-1-25

Sec. 25. (a) The commission shall adopt rules establishing standards for plans.

(b) With respect to archeological plans, the rules must impose a standard of conduct that does the following:

(c) With respect to development plans, the rules must impose a standard of conduct that preserves and protects both of the following:

(d) Subject to subsection (e), plans required under this chapter must be submitted to the department for approval according to rules adopted by the commission.

(e) Proposed plans submitted to the department must be:

by the department not more than sixty (60) days after the date of submission.  If the department does not take any action on the plan within the time required by this subsection, the plan is considered to be approved, unless approval is prohibited under a state or federal law.  If the department requests additional information under subdivision (3), the department shall approve or deny the resubmitted plan not more than thirty (30) days after the resubmitted plan is received.