Mo. Rev. Stat. § 472.490: Severability clause.

If any provision of sections 472.400 to 472.490 or the application of such sections to any person or circumstance is held invalid, the invalidity does not affect other provisions or application of sections 472.400 to 472.490 which can be given effect without the invalid provision or application, and to this end the provisions of sections 472.400 to 472.490 are severable.