The Legislative Services Agency publishes rules for all state agencies.  Permanent rules for the Department of Natural Resources are adopted by the Natural Resources Commission and compiled within 312 IAC. http://iac.iga.in.gov/iac/iac_title?iact=312

Temporary or emergency rules are adopted by the DNR Director and published regularly in the Indiana Register. http://iac.iga.in.gov/iac/irtoc.htm

The Commission provides a list of DNR’s active temporary or emergency rules.  https://www.in.gov/nrc/rules/emergency-rules/