Mo. Rev. Stat. § 329.260: Recognition of license, certificate, permit or other authority held before August 28, 1995.

Any person holding a valid license, certificate, permit, or other authority, regulated or granted pursuant to sections 329.010 to 329.250 on August 28, 1995, shall be recognized by the board and shall be entitled to retain any existing status, so long as the person complies with the provisions of sections 329.010 to 329.260 and any rules promulgated pursuant thereto. Such recognition shall be as follows:

(1) All persons previously licensed as Class A shall be recognized as Class CH;

(2) All persons previously licensed as Class B shall be recognized as Class MO;

(3) All persons previously licensed as Class A and Class B shall be recognized as Class CA.