I believe the AAU was at least at one time a property of the Disney Corporation.
At least one winner in the late 90's of the Mr. A sued the AAU because they rescinded his title due to a psotive polygraph test.
He was awarded 100 K.
Michael Eisner heard of this, and, being that Disney would not, naturally, want anything to do with drugs in any of their ventures, dumped bb, and , in effect, froze the 'Mr." titles from being used again.