City Council License Committee speedily approved new measures Thursday to make it easier to revoke licenses for about 370 charter vehicles, or so-called “party buses”, licensed in Chicago, and to crack down on unlicensed buses operating in the city. The move comes after a series of highly-publicized shootings and violent incidents. The ordinance strengthens and increases penalties for charter operators who do not take steps to warn passengers of that unlawful weapons and substances are not allowed.