Minn. Stat. § 273.1315
Any property owner seeking classification and assessment of the owner's homestead as class 1b property pursuant to section 273.13, subdivision 22, paragraph (b), clause (2) or (3), shall file with the commissioner of revenue for each assessment year a 1b homestead declaration, on a form prescribed by the commissioner. The declaration shall contain the following information:
(c) any additional information prescribed by the commissioner.
The declaration shall be filed on or before March 1 of each year to be effective for property taxes payable during the succeeding calendar year. The declaration and any supplementary information received from the property owner pursuant to this section shall be subject to chapter 270B.
The commissioner shall provide to the assessor on or before April 1 a listing of the parcels of property qualifying for 1b classification.