MO SB1371

Redefines "joint physical custody" to require equal or substantially equal parenting time, replacing the previous standard of "significant, but not necessarily equal" time

Creates a rebuttable presumption that equal or substantially equal parenting time is in the child's best interests, which can only be overcome by preponderance of evidence based on specific factors including domestic violence patterns

Adds substance abuse history as a factor courts must consider when determining custody arrangements

Requires courts to consider the distance between parents' residences and any relocation that has occurred or is intended when making custody decisions

Expands provisions for considering a child's input on custody arrangements, requiring the court to assess whether the child has sufficient ability, age, and maturity to express an independent preference free from parental influence