NY, NJ, and CT agree on joint, common closure requirement.  Article here

Not all neighboring states included.

“Our primary goal right now is to slow the spread of this virus so that the wave of new infections doesn’t crash our healthcare system, and everyone agrees social distancing is the best way to do that,” Cuomo said. “This is not a war that can be won alone, which is why New York is partnering with our neighboring states to implement a uniform standard that not only keeps our people safe but also prevents ‘state shopping’ where residents of one state travel to another and vice versa.

“I have called on the federal government to implement nationwide protocols but in their absence we are taking this on ourselves.”