All licensees, their agents or employees shall immediately report to the city police any altercations known as fist fights which shall include any physical abuse of another, that occurs on the tavern premises and shall further immediately report to the city police if any tavern patron, other than a police official, is known to be in possession of a gun, knife or other deadly weapon.
(1980 Code, § 18.037) Penalty, see § 111.999