Primary law and terminology
Mont. Code Ann. § 40-4-212 (parenting plan factors). In Montana, courts generally describe the schedule as a parenting plan. The court's decision is based on the child's best interests, not simply a parent's preferred percentage of time.
Joint custody and parenting time
No presumption; Montana requires a parenting plan in every case with children.
Child preference
The child's wishes are a listed factor.
Relocation and move-away cases
§ 40-4-217 requires written notice of intent to move, sent 30 days ahead by certified mail.
Changing an existing order
A change in circumstances of the child is required under § 40-4-219.
Where to file
Under the UCCJEA the child generally must have lived in the state for the 6 months before filing (or since birth, if younger). Montana uses 'parenting plan' rather than custody — required in every dissolution with children.