Montana Title 5. Legislative Branch § 5-2-104. Appointment to or candidacy for other offices

(1) A member of the legislature may not, during the term for which the member was elected, be appointed to any civil office under the state. A member of the legislature may become a candidate for public office during the legislator's term.

(2) A member of the legislature who is elected to another public office shall resign from the legislature prior to assuming the office to which the member is newly elected.