without getting into a giant legal argument, with a bunch of folks that aren't lawyers (including myself), I think these two last arguments may not be super accurate depending upon the municipality and their local/state laws. For example, most of the time, while you may be visiting another municipality, you are still required to observe their local laws. Once you cross that line, you have to observe local laws. Otherwise, how could extremely punitive places like NY and CA wouldn't for example be able to prevent folks brining in certain firearms.
In Denver for example, they will regularly ticket people that don't have front license plates (with a pretty costly ticket) regardless of whether the vehicle is from Denver, cities/counties outside of Denver, or even from other states. Front license plates are state law here, but 95% of the counties in the state don't care about the front license plate, but Denver loves the revenue. The magistrates don't even care if your vehicle is designed without a front license plate mount.
In many states (and maybe this was part of the issue in NY), the light penetration levels of tint are not considered a primary infraction that an officer can use to pull over a vehicle. Its a secondary infraction once the person is pulled over for another infraction and I've seen that use as a way to throw out infractions. I used to tint vehicles for several years here in CO and that was true here, but not everywhere. I've definitely seen folks get pulled over for the 3rd light in CO, although in most cases it's just to let them know.
