Primary law and terminology
RSMo § 452.375 and § 452.310 (proposed parenting plan). In Missouri, 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
Public policy favors frequent, continuing and meaningful contact; a written plan must be filed with the petition.
Child preference
The child's wishes are a statutory factor.
Relocation and move-away cases
RSMo § 452.377 requires 60 days' written notice by certified mail before any relocation.
Changing an existing order
A substantial change in the circumstances of the child or custodial parent is required.
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). Missouri requires a proposed parenting plan filed with the petition (RSMo §452.310).