Minn. Const. art. XII, § 5

The legislature shall provide by law for charter commissions. Notwithstanding any other constitutional limitations the legislature may require that commission members be freeholders, provide for their appointment by judges of the district court, and permit any member to hold any other elective or appointive office other than judicial. Home rule charter amendments may be proposed by a charter commission or by a petition of five percent of the voters of the local government unit as determined by law and shall not become effective until approved by the voters by the majority required by law. Amendments may be proposed and adopted in any other manner provided by law. A local government unit may repeal its home rule charter and adopt a statutory form of government or a new charter upon the same majority vote as is required by law for the adoption of a charter in the first instance.