Minn. Stat. § 173.09: VIOLATIONS, REMEDIES.

Any advertising device in place within a scenic area four months after the property rights for such area have been acquired which is in violation of sections 173.01 to 173.11 or any rule issued or adopted thereunder, is hereby declared to be a public nuisance, illegal and nonconforming and may be abated in the manner prescribed by law for the abatement of public nuisances, or the commissioner may enter upon the land and remove the sign.