INTERSTATE COMMERCE requires all drivers to stay within the hours of service limits if:
- Vehicle has a gross vehicle weight rating or gross combination weight rating, or gross vehicle weight or gross combination weight, of 10,001 lbs. or more, whichever is greater.
- Is used in transporting hazardous material in a quantity requiring placarding.
[Source: CFR 390.5 Definition of CMV]
Ag exemption - operators transporting agricultural commodities or farm supplies with a 100 air-mile radius.
INTERSTATE TRAVEL requires all operators stay within the limit of hours of service with the exception of those operators who operate two-axle vehicles under 10,000 lbs. gross weight, and operators transporting agricultural commodities or farm supplies within a 100 air-mile radius.
[Source: CDL Guide 2007-2009: Department of Transportation Requirements Inter-State Authority]