In my state (PA) the following regs are true:
Quote:
CLASSIFICATIONS
With the implementation of the Commercial Driver Licensing Program, Pennsylvania adopted a new
classification system. CDL classifications include:
CLASS A
A Class A license is issued to those persons 18 years of age or older who have demonstrated their
qualifications to operate any combination of vehicles with a gross vehicle weight rating of 26,001
pounds or more, provided the gross vehicle weight rating of the vehicle or vehicles being towed is in
excess of 10,000 pounds. The holder of a Class A license is qualified to operate vehicles for which
a Class B or Class C license is issued. Where required, appropriate endorsements must be
obtained.
CLASS B
A Class B license is issued to those persons 18 years of age or older who have demonstrated their
qualifications to operate any single vehicle with a gross vehicle weight rating of 26,001 pounds or
more or any such vehicle towing a vehicle having a gross vehicle weight rating of not more than
10,000 pounds. The holder of a Class B license is qualified to operate vehicles for which a Class C
license is issued. Where required, appropriate endorsements must be obtained.
CLASS C
A Class C license is issued to those persons 18 years of age or older who have demonstrated their
qualifications to operate any single vehicle with a gross vehicle weight rating of not more than
26,000 pounds or any combination of vehicles, except combination vehicles involving motorcycles,
that does not meet the definition of a Class A or Class B vehicle. Where required, appropriate
endorsements must be obtained.
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Class C is a non-commercial license. I can't remember, and don't really feel like looking, but I think air brakes are a seperate endorsement here.