Minn. Stat. § 40A.121
Subd. 1. Annexation prohibited.
Land within an agricultural preserve that is within a township may not be annexed to a municipality under chapter 414, unless the director of the Office of Strategic and Long-Range Planning finds that either:
Subd. 2. Exception.
This section does not apply to annexation agreements approved under chapter 414 prior to creation of the zone.