Section 42-4-404 - Jurisdiction and venue(1) The court has jurisdiction over a proceeding for the adoption of an adult or emancipated minor if the petitioner has lived in Montana for at least 90 days immediately preceding the filing of a petition for adoption.(2) A petition for adoption must be filed in the court in the county in which a petitioner lives.En. Sec. 124, Ch. 480, L. 1997.