Simplify the following text for a Grade 12 native English-speaking person.
Original: Emergency ambulance work in all NHS bodies and most voluntary and private firms is based on the guidance published by the Joint Royal Colleges of medicine Ambulance Liaison Committee ( JRCALC ) .
Simplified: All ambulance companies and the NHS Ambulance trusts must follow the same laws , so a private ambulance must have the same equipment and the people working in it be as qualified as the same type of NHS ambulance .