Except as provided in section 44.3 of this chapter, a rulemaking action that does not conform with this chapter is invalid, and a rule that is the subject of a noncomplying rulemaking action does not have the effect of law until it is adopted in conformity with this chapter. However, the failure of an agency to comply with section 20(a)(2) of this chapter does not invalidate the rulemaking action.
IC 4-22-2-44