Minn. Stat. § 394.34

If a county is conducting or in good faith intends to conduct studies within a reasonable time, or has held or is holding a hearing for the purpose of considering a comprehensive plan or official controls or an amendment, extension, or addition to either, or in the event new territory for which no zoning may have been adopted, may be annexed to a municipality, the board in order to protect the public health, safety, and general welfare may adopt as an emergency measure a temporary interim zoning map or temporary interim zoning ordinance, the purpose of which shall be to classify and regulate uses and related matters as constitutes the emergency. Such interim resolution shall be limited to one year from the date it becomes effective and to one year to renewal thereafter.