It shall be the duty of every holder of a license to manufacture and sell, or sell nonintoxicating beer, to use every precaution to prevent any person on the premises described in such permit from pouring into, mixing with or adding to such nonintoxicating beer any alcohol or other liquid, or any alcohol cube or other ingredient that will increase the alcoholic content of such nonintoxicating beer. Any such license holder who shall knowingly permit any person on the premises described in such permit to pour into, mix with or add to such nonintoxicating beer any alcohol or other liquid, or any alcohol cube or other ingredient that will increase the alcoholic content of such nonintoxicating beer, shall be subject to having his license suspended or revoked.

(Code 1964, § 4.480)

     State law reference(s)--Similar provisions, RSMo. § 312.460.