Ind. Code § 22-4-32-6
Any interested party to the dispute shall mean and include:
(4) any person appearing to the liability administrative law judge to be necessary or indispensable to the determination of the issues involved in the hearing.
Formerly: Acts 1947, c.208, s.3306; Acts 1957, c.299, s.11. As amended by P.L.18-1987, SEC.88; P.L.135-1990, SEC.27; P.L.21-1995, SEC.122; P.L.200-2025, SEC.33.