MONTANA AIS Aquatic Invasive Species Regulations Must stop at ALL open watercraft inspection stations as directed. When traveling west across the Continental Divide or into the Flathead River Basin, watercraft must be inspected before launching. Boats with bladders or ballast tanks, such as wakeboard or wake-surfing boats, must obtain a decontamination before launching. Inspections are required for all watercraft coming off Tiber reservoir. Decontamination may be required. CSKT NATURAL RESOURCES OXO FWP.MT.GOV/AIS STOP CLEAN, DRAIN, & DRY YOUR WATERCRAFT MONTANA AIS Aquatic Invasive Species Regulations Must stop at ALL open watercraft inspection stations as directed . When traveling west across the Continental Divide or into the Flathead River Basin , watercraft must be inspected before launching . Boats with bladders or ballast tanks , such as wakeboard or wake - surfing boats , must obtain a decontamination before launching . Inspections are required for all watercraft coming off Tiber reservoir . Decontamination may be required . CSKT NATURAL RESOURCES OXO FWP.MT.GOV/AIS STOP CLEAN , DRAIN , & DRY YOUR WATERCRAFT