"Ambulance assistance vehicle" has the meaning provided under 77 Ill. Adm. Code 515.825 and includes, but is not limited to, fire apparatus and fire department vehicles.
"Ambulance assistance vehicle provider" or "provider" means a provider of ambulance assistance vehicles that is licensed under this Act and serves a population within the State.
The EMS Medical Director may define what constitutes an in-field service level upgrade through an EMS System policy or procedure. An in-field service level upgrade may include, but need not be limited to, an upgrade to a licensed ambulance, alternate response vehicle, or specialized emergency medical services vehicle.
210 ILCS 50/3.88