drivers licenses
You can find all requirements for CDL licenses at www.fmcsa.dot.gov. This is the government website for motor carriers, and explains all the types of licenses and what you need to do to get them.
All states (an all countries) have reciprocity for drivers licenses, learners permits are a much more complicated issue.
In some states, yes.
All of the US states honor the drivers licenses of the other States. However, they do not necessarily honor the learners permits, or other restricted(farm/school) licenses.
No. These licenses are controlled by the several states.
Yes, it is possible to hold licenses in different states simultaneously.
Most states have special laws for mopeds under 50cc's. Some states require special licenses, while others require no license at all.
No..Most states are compact states which report invalid licenses to each other.
Texas.
Yes, all practicing veterinarians in the United States must have a valid license for the State they are practicing in.
In most, if not all states, yes.
In the US, licenses are issued by the individual States, and will vary by location.