Mo. Rev. Stat. § 452.925: Severability clause.

If any provision of sections 452.700 to 452.930 or its application to any person or circumstance is held invalid, the invalidity shall not affect other provisions or applications of sections 452.700 to 452.930 which can be given effect without the invalid provision or application, and to this end the provisions of sections 452.700 to 452.930 are severable.