Land within an agricultural preserve shall be maintained for agricultural production. The average maximum density of residential structures within an agricultural preserve shall not exceed one unit per 40 acres. The location of any new structure shall conform to locally applicable zoning regulations. Commercial and industrial uses shall not be permitted except as provided in subdivision 2 after the user is issued a permit by the authority. The authority shall be responsible for enforcing this section.
(a) Commercial and industrial operations are not allowed on land within an agricultural preserve except:
(1) small on-farm commercial or industrial operations normally associated with and important to farming in the agricultural preserve area;
(2) storage use of existing farm buildings that does not disrupt the integrity of the agricultural preserve; and
(3) small commercial use of existing farm buildings for trades not disruptive to the integrity of the agricultural preserve such as a carpentry shop, small scale mechanics shop, and similar activities that a farm operator might conduct.
(b) "Existing" in paragraph (a), clauses (2) and (3), means existing on August 1, 1987.
When a separate parcel is created for a residential structure, commercial, or industrial use permitted under subdivision 1, the parcel shall cease to be an agricultural preserve unless the eligibility requirements of section 473H.03 are met. However, the separate parcel shall remain under the maximum residential density restrictions in effect for the original preserve at the time it was placed into the preserve until the agricultural preserve status for the original parcel ends.