Window tint levels in NY state are limited to a minimum of 70% light transmittance. I do not believe this is the most restrictive requirement but new england isn't as sunny as Arizona or Florida. https://drivinglaws.aaa.com/tag/glass-window-tinting/
Looks like Connecticut, where the vehicle may have been registered, allows 35% VLT tint, and NY law allows out-of-state vehicles to have tint that conforms to their home state's laws. Also, of course, tint laws are not always strictly enforced.
Now they are enforced during annual safety inspection.
People now buy packages where you pay annually and the tinting people will remove your tint, inspect your car, and then re-tint the car on the same day!