Minn. Stat. § 18.82
Subd. 1. Permits.
Except as provided in section 21.74, if a person wants to transport along a public highway materials or equipment containing the propagating parts of weeds designated as noxious by the commissioner, the person must secure a written permit for transportation of the material or equipment from an inspector or county-designated employee. Inspectors or county-designated employees may issue permits to persons residing or operating within their jurisdiction. If the noxious weed propagating parts are removed from materials and equipment or devitalized before being transported, a permit is not needed.
Subd. 2. Conditions of permit issuance.
The following conditions must be met before a permit under subdivision 1 may be issued:
Subd. 3. Duration of permit; revocation.
A permit under subdivision 1 is valid for up to one year after the date it is issued unless otherwise specified by the inspector or county-designated employee issuing the permit. The permit may be revoked if an inspector or county-designated employee determines that the applicant has not complied with this section.