Minn. Stat. § 325D.64
An action under sections 325D.49 to 325D.66, shall be forever barred unless commenced within four years of the date upon which the cause of action arose. No cause of action barred under existing law on June 8, 1971 shall be revived by sections 325D.49 to 325D.66. For the purpose of this section, a cause of action for a continuing violation is deemed to arise at any time during the period of the violation.
If any proceeding is commenced under sections 325D.49 to 325D.66, by the attorney general on behalf of the state of Minnesota, its departments or agencies, or its political subdivisions, the running of the statute of limitations in respect of every right of action arising under sections 325D.49 to 325D.66, and based in whole or in part on any matter complained of in the aforementioned proceeding shall be suspended during the pendency thereof and for one year thereafter. If the running of the statute of limitations is suspended, the action shall be forever barred unless commenced within the greater of either the period of suspension or four years after the date upon which the cause of action arose.
Minn. Stat. § 325D.64
1971 c 865 s 16