Answer:
You would be subject to the law of both states, and the federal government.
Step-by-step explanation:
In order to make business in each state, you have to follow their regulations as a requirement, since they define the specific terms and rules you have to follow in that specific state.
Since you are working in several states you also have to follow federal law, this one is not as specific, but it will also have guidelines that you will have to follow for your business, that are not in the state regulations but are also mandatory.