It means they stay within a single state. Even if someone if renewing or getting their CDL with the intent of only partaking in intrastate transport, they should still self-identify as "non-exempted interstate".
Intrastate commerce is that business that is conducted between business entities that exist within the same state, while interstate commerce is that which is conducted between businesses located in differing states.
Intrastate commerce.
Sometimes. Depends on the Gross Vehicle Weight Rating of the vehicle, whether its use is for interstate or intrastate commerce, etc.
It is a reserved power.
reserved
The buying and selling of products and services within a single state.
Depends on the model. International makes them from 18,000 GVWR up to 33,000 GVWR (which some states will allow a GVW of 35,000 for intrastate commerce).
Congress cannot regulate intrastate commerce or commerce within a state. The U. S. Congress regulates interstate commerce or that between two states.
18 for intrastate commerce, 21 for interstate commerce. That's a federal law.
The power to control Intrastate commerce is reserved to the states and the people. It is protected under the Ninth and Tenth Amendments to the U.S. Constitution.
Non-exempted, though, personally, I don't see why you'd restrict yourself by certifying as intrastate rather than interstate.
It applies only to Commercial Driver Licenses (CDLs). "U" is the code for "intrastate only" (as it pertains to operation of a Commercial Motor Vehicle). It's given to people who either get a CDL when they are below the age of 21 or who self-certify themselves as "intrastate exempt" or "intrastate non-exempt" drivers.