US lawMontanaRegulationsTitle 18 — TRANSPORTATIONChapter 18.6 — RIGHT-OF-WAY BUREAUSubchapter 18.6.2 — Outdoor Advertising Regulations18.6.232ARM 18.6.232ARM 18.6.232. PROHIBITED SIGNSLast amended: 2016Length: 10 wordsOfficial source Cite as Mont. Admin. R. 18.6.232(1) Commercial variable message signs are prohibited on controlled routes.PreviousARM 18.6.231NextARM 18.6.232