§ 111.06  CONDITION FOR INVALIDITY OF LICENSE.
   The use of any article or device mentioned herein for any unlawful purpose shall invalidate any license issued therefor, and the conviction of any person who shall harbor, maintain, or operate same, or permit their use for any unlawful purpose shall work an immediate revocation of any license or licenses issued hereunder.
('83 Code, § 3-9 VIII.)