US lawMontanaRegulationsTitle 17 — ENVIRONMENTAL QUALITYChapter 17.8 — AIR QUALITYSubchapter 17.8.7 — Permit, Construction, and Operation of Air Contaminant Sources17.8.731ARM 17.8.731ARM 17.8.731. DURATION OF PERMITRepealedLast amended: 2002Length: 1 wordsOfficial source Cite as Mont. Admin. R. 17.8.731(REPEALED)PreviousARM 17.8.730NextARM 17.8.732