210 ILCS 50/3.15
The Department shall designate Emergency Medical Services (EMS) Regions within the State, consisting of specific geographic areas encompassing EMS Systems and trauma centers, in which emergency medical services, trauma services, and non-emergency medical services are coordinated under an EMS Region Plan.
In designating EMS Regions, the Department shall take into consideration, but not be limited to, the location of existing EMS Systems, Trauma Regions and trauma centers, existing patterns of inter-System transports, population locations and density, transportation modalities, and geographical distance from available trauma and emergency department care.
Use of the term Trauma Region to identify a specific geographic area shall be discontinued upon designation of areas as EMS Regions.
210 ILCS 50/3.15