Minn. R. Civ. P. 25.04
When any public officer is a party to an action and during its pendency dies, resigns, or otherwise ceases to hold office, the action may be continued and maintained by or against the officer's successor if it is satisfactorily shown to the court that there is a substantial need for so continuing and maintaining it. Substitution pursuant to this rule may be made when it is shown by supplemental pleading that the successor of any officer adopts or continues or threatens to adopt or continue the action of the officer's predecessor. Before a substitution is made, the party or officer to be affected, unless expressly assenting thereto, shall be given reasonable notice of the application therefor and accorded an opportunity to object.
Minn. R. Civ. P. 25.04