A court may not: (1) admit into evidence in any proceeding under this part the vaccination status of a parent or a minor child; or (2) consider a person's vaccination status in making any order related to child support, child custody, visitation, or parental rights.
Vaccination Status Prohibited As Evidence Or Grounds For Decision
Mont. Code Ann. § 40-4-235, under Support, Custody, Visitation, and Related Provisions.
Mont. Code Ann. § 40-4-235