Indiana Code Title 22. Labor and Safety § 22-13-5-3

Sec. 3. (a) A written interpretation issued under section 2 of this chapter binds the interested person and the county or municipality with whom the interested person has the dispute until the written interpretation is overruled in a proceeding under IC 4-21.5.

(b) For purposes of IC 4-21.5, the commission is the ultimate authority regarding a written interpretation issued under section 2 of this chapter.