Mo. Rev. Stat. § 322.110

The provisions of sections 322.090 to 322.130 and the regulations adopted thereunder shall not be applicable within the limits of any municipality which has adopted or which shall hereafter adopt by ordinance a system of rabies control conforming to and not in conflict with the regulations adopted hereunder; provided, however, that any municipality located in any county subject to sections 322.090 to 322.130 shall have the power to contract for the use of the rabies control facilities maintained by the county.