This is a generalized answer to your question. First of all you have to determine if your machine fits your own state's legal definition of an ATV, ORV or some other type vehicle classification. If it does, then you have to abide by the regulations set down by your state. Each state has it's own laws that govern registration and the use of ATVs and or ORVs within that state. The regulations can be very different from state to state. In some states an aatv is not considered an ATV or ORV and they cannot be registered or operated on public lands. Some states govern the use of an aatv on water, ice covered lakes and rivers etc. In some states an aatv is required to be registered as a watercraft if used on the water whether or not it is registered as anything else. If you are operating your machine in a state where you are a non-resident, you are governed by that state's regulations and laws.
Check with the regulatory agencies in your own state to see what laws govern the use of your machine. In many states the DNR regulates ATV use. Their use on Federal lands also varies depending upon what state the Federal lands are located in.