Mo. Rev. Stat. § 205.977: Tax authorized.

Any county which has one or more service areas within its boundaries or which is within the boundaries of a service area may, by a majority vote of the qualified voters voting thereon, levy and collect a tax to accomplish any of the following purposes:

(1) Providing necessary funds to establish, operate, and maintain community mental health centers, mental health clinics, or any comprehensive mental health services;

(2) Providing funds to supplement existing funds for the operation and maintenance of community mental health centers, mental health clinics, or any comprehensive mental health services;

(3) Purchasing any of the comprehensive mental health services from community mental health centers, mental health clinics, and other public facilities or not-for-profit corporations which are designated by the department.