US lawMinnesotaRegulationsDEPARTMENT OF HEALTHChapter 4620 — CHAPTER 4620, CLEAN INDOOR AIR4620.3910Minn. R. 4620.3910APPLICATIONLast amended: 2012Year: 2026Length: 13 wordsOfficial source Parts 4620.3900 to 4620.4800 apply to owners or operators of indoor ice arenas.PreviousMinn. R. 4620.3900NextMinn. R. 4620.3950