http://www.dmv.ca.gov/pubs/cdl_htm/sec1.htmWho Needs a CDL? To operate commercial vehicles, you must apply for a CDL. Only California residents may obtain a California CDL. Residency is established by any of the following: registering to vote here, paying resident tuition at a public institution of higher education, filing for a California homeowner's property tax exemption, obtaining a license (such as a fishing license), or any other privilege or benefit not ordinarily extended to nonresidents. You need a CDL if you operate a vehicle or combination of vehicles which requires a Class A or Class B, license or Class C license with endorsements.
This handbook will help you pass the written and skills tests. However, this handbook is not a substitute for a truck driver training class or program. Formal training is the most reliable way to learn the many special skills required for safely driving a large commercial vehicle and becoming a professional driver in the trucking industry.
A commercial motor vehicle is a motor vehicle or combination of vehicles that:
•Has a gross vehicle weight rating (GVWR) of 26,001 pounds or more.
•Is a combination vehicle with a gross combination weight rating of 26,001 or more pounds,
if the trailer(s) has a GVWR of 10,001 or more pounds.•Tows any vehicle with a GVWR of
10,001 pounds or more.•Tows more than one vehicle or a trailer bus.
•Has three or more axles (excludes three-axle vehicles weighing 6,000 pounds or less gross).
•Is any vehicle (bus, farm labor vehicle, general public paratransit vehicle, etc.) designed, used, or maintained to carry more than 10 passengers including the driver, for hire or profit, or is used by any nonprofit organization or group.
•Is any size vehicle which requires hazardous material placards or is carrying material listed as a select agent or toxin in 42 CFR part 73.*
•Transports hazardous wastes (Health and Safety Code §§25115 and 25117).*
I can find no exemptions for out of state vehicles from California's definition of a commercial vehicle.