Minn. Stat. § 67A.04

The certificate of incorporation of any township mutual fire insurance company may be amended in respect to any matter which the original certificate of incorporation might lawfully have contained, or which is authorized by the provisions of sections 67A.01 to 67A.26 , by the adoption of a resolution, specifying the proposed amendment, at the regular meeting, or a special meeting called for that expressly stated purpose, by a majority vote of its members present and voting; or by a majority vote of its entire board of directors, within one year after having been thereby duly authorized by a specific resolution duly adopted at such meeting of the members, and by causing the resolution to be embraced in a certificate duly executed by its president and secretary under the corporate seal of the company, if it have one, and approved, filed, and recorded in the manner prescribed by such sections for the approval, filing, and recording of the original certificate.