Ind. Code § 4-22-2-15
Any rulemaking action that this chapter allows or requires an agency to perform, other than final adoption of a rule under section 29, 37.1, or 37.2 of this chapter or IC 13-14-9, may be performed by the individual or group of individuals with the statutory authority to adopt rules for the agency, a member of the agency's staff, or another agent of the agency. Final adoption of a rule under section 29, 37.1, or 37.2 of this chapter or IC 13-14-9, including readoption of a rule that is subject to sections 23 through 36 or to section 37.1 of this chapter and recalled for further consideration under section 40 of this chapter, may be performed only by the individual or group of individuals with the statutory authority to adopt rules for the agency.
IC 4-22-2-15