Minnesota boaters have one more item on their to-do list as they prepare to head to the lakes and rivers. A new state law requires all watercraft to have a sticker listing the rules for preventing the spread of aquatic invasive species. They’re now available at all Department of Motor Vehicle offices and DNR regional offices. Sporting goods stores have reportedly been having trouble getting them, however. The stickers are required on all watercraft – including boats, canoes, kayaks, paddleboats and personal watercraft. New legislation also allows officers to conduct roadside inspections of watercraft for invasive species. State officials say that anglers are expected to know the rules, and officers are more likely to issue tickets rather than warnings this summer.