As an aside, medical and law licenses have no reciprocity. A doctor or lawyer moving to another state must take a medical or bar exam before they are allowed to practice.
And typically, driver’s licenses are recognized until six months’ residency, when many states regard their holders as residents and require them to get in state licenses. This is for tax (and instate college tuition) purposes.
That's true up to a point (most states grant "courtesy privileges" for a period of up to six months, or longer for a particular case).
Consider this: My family lives in NY State. If, while I am there, a prescription is needed from me, it will be honored, no questions, and I face no legal jeopardy. If I MOVE to NY State, and open an office to write thousands of prescriptions, then I need a license.
If, while I am there, a bad guy breaks into my family's home and I shoot him dead, DESPITE having license or reciprocity in 34 States, I go to prison with no chance of leniency.
In any event, Congress has the power, under the full faith and credit clause, to rectify this situation.
Yeah I thought about the law an md license after I posted that ... my bad, thanks for correcting me.
Brain Fart on my part......:o)
Stay Safe !!