Montana Title 28. Contracts and Other Obligations § 28-2-903. What contracts must be in writing

(a) an agreement that by its terms is not to be performed within a year from the making of the agreement;

(b) a special promise to answer for the debt, default, or miscarriage of another, except in the cases provided for in 28-11-105;

(c) an agreement made upon consideration of marriage other than a mutual promise to marry;

(d) an agreement for the leasing for a longer period than 1 year or for the sale of real property or of an interest in real property. The agreement, if made by an agent of the party sought to be charged, is invalid unless the authority of the agent is in writing and subscribed by the party sought to be charged.

(e) an agreement authorizing or employing an agent or broker to purchase or sell real estate for compensation or a commission.