Mo. Rev. Stat. § 431.065
Current with changes from the 2024 Legislative Session
Any minor who has been lawfully married and any minor parent or legal custodian of a child, if otherwise competent to contract, shall be considered an adult for the purpose of entering into a contract for surgical, medical, or other treatment or procedures for himself, his spouse, his child and any child in his legal custody.
§ 431.065, RSMo