720 ILCS 640/1

Any parent, legal guardian or other person commits improper supervision of a child when he knowingly permits a child in his custody or control under the age of 18 years to associate with known thieves, burglars, felons, narcotic addicts or other persons of ill repute, visit a place of prostitution, commit a lewd act, commit an act tending to break the peace or violate a municipal curfew ordinance.