This is an Ambulance crew that is provided free of charge, but this is an Ambulance that is also on duty and subject to getting a call/emergency. These events are usually school demos, small 5K’s, Block parties, Community celebrations, etc.
This is an Ambulance crew that is paid for and dedicated to that event. This type of Event would include large gatherings of people, Football games (High School, College etc.), Boxing, Concerts, Large races (Tour de Rock, Marathons etc.).