Mont. Code Ann. § 27-2-211

27-2-211 . Actions to enforce penalty or forfeiture or other statutory liability. (1) Within 2 years is the period prescribed for the commencement of an action upon:

(a) a statute for a penalty or forfeiture when the action is given to an individual or to an individual and the state, except when the statute imposing it prescribes a different limitation;

(b) a statute or an undertaking in a criminal action for a forfeiture or penalty to the state;

(c) a liability created by statute other than:

(i) a penalty or forfeiture; or

(ii) a statutory debt created by the payment of public assistance.

(2) The period prescribed for the commencement of an action by a municipal corporation for the violation of any city or town ordinance is within 1 year.

(3) Notwithstanding any other provision of this chapter, actions against directors or stockholders of a corporation to recover a penalty or forfeiture imposed or to enforce a liability created by law must be brought within 3 years after the discovery by the aggrieved party of the facts upon which the penalty of forfeiture attached or the liability was created.

(4) Unless fraud is involved or unless a support obligation has been entered, an action to enforce a statutory debt created by the payment of public assistance must be brought within 5 years from the date the debt arises. If fraud is involved, an action must be brought within 5 years of the discovery of the fraud. If a support obligation has been entered, an action must be brought within 10 years of the termination of the support obligation or within 10 years from entry of a lump-sum judgment or order for support arrears, whichever is later.