In the US, in my home state (call it HS), it's explicitly legal to ride a 50cc scooter/moped on the street without a driver's license. Let's say I have no license and drive my scooter into some other state (call it OS), which requires a driver's license and/or a motorcycle license or endorsement to ride a 50cc scooter. Am I legally allowed to drive it on OS roads? I know that if it were a larger motorcycle and I had an appropriate license issued by HS, the Full Faith and Credit Clause would compel OS to respect my license, but does this also apply to the case where there is no license, and OS has to decide whether to respect HS's lack of requirement?
Note: I am not asking about whether or not a given state can require drivers to have a license, I'm asking how a state licensing law applies to residents of other states who are travelling or visiting. States have widely varying laws around what license classes are required for various vehicle classes, and I'm asking how these differences are resolved when touring across state lines. Do I have to get the maximum level of certification that would apply across every state on my route?