Montana Title 5. Legislative Branch § 5-4-305. Bills returned without approval

(1) A bill or item or items of an appropriations bill become law whenever:

(2) The bill or item or items must be authenticated by a certificate endorsed on or attached to the bill or the copy of the statement of objections. The form of the certificate must be: “This bill having been returned by the governor with objections and, after reconsideration, having passed both houses by the constitutional majority has become a law this ․․․․ day of ․․․․, A.D. ․․․․” or “The following items in the within statement (naming them) having, after reconsideration, passed both houses by the constitutional majority have become a law this ․․․․ day of ․․․․, A.D. ․․․․”. The endorsement, signed by the president of the senate and the speaker of the house, is sufficient authentication of the bill or item or items.

(3) The authenticated bill or statement must be delivered to the governor, who shall deposit it with the laws in the office of the secretary of state.