No person shall cause to be operated or shall operate any boiler or boat without having the same inspected at least once each year, or pressure vessel, steam farm traction engine, portable or stationary show engine, or portable or stationary show boiler without having it inspected biennially, or without having the proper engineer or master license.
After any boiler or pressure vessel has been examined and found to be unsafe and after the owner or operator of the boiler or pressure vessel has been notified of any defect in it, no person shall operate the boiler or pressure vessel or cause it to be operated unless and until the defect has been corrected.
Official Publication of the State of Minnesota
Revisor of Statutes