MissionChief US uses MPDS Determinant Codes as a basis for the type of vehicle required:
Alpha Level patients (XX-A-XX): Can be treated by either BLS, ALS or Fly-Car and released. If transport is required BLS and ALS can transport.
Bravo Level patients (XX-B-XX): Can be transported by BLS or ALS Ambulance
Charlie, Delta & Echo level patients, can be transported by ALS Ambulance OR a BLS Ambulance can transport when either a Fly-Car or EMS Rescue is on scene.
Omega Level patients, are presently only allowing transport by ALS patient, the actual determinant code of Omega is meant to be a referable call, this is presently in error.
The better clarify:
Fly-Car or EMS Rescue: Can treat and release patients or act as an ALS upgrade for a BLS ambulance to transport Charlie, Delta, Echo and Omega patients.
BLS Ambulance can treat and transport Alpha and Bravo patients.
ALS Ambulance can treat and transport all patients.
Fly-Car/EMS Rescue/BLS Ambulance: Can treat patients above their level that require transport up to 90%, then will require an additional unit to complete/transport.