The Nassau County District Attorney's Office conducts sting operations of tobacco retailers to ensure that they are not selling tobacco to minors. As part of this effort, they use local high school students to go into stores and try to buy tobacco, some of them using phony ID's such as out of state driver's licenses. It may well be that this franchise owner got hit with a number of fines for accepting the phony ID and made a decision to only accept NYS driver's licenses. I've seen this posted at other retailers as well.