Judge Nina Morrison of the US District Court for the Eastern District of New York (Brooklyn, Queens, Staten Island, and Long Island) has ruled that police, including officers of U.S. Customs and Border Protection (CBP), need a warrant to search your cellphone at JFK International Airport, even when you are entering or leaving the US.

This ruling is certainly a positive development. It’s a break with a line of judicial decisions that have made US borders and international airports a Fourth Amendment-free zone, even for US citizens. It’s likely to influence other judges and other courts, even though — as a ruling from a District Court rather than an appellate court — it doesn’t set a precedent that’s binding even on other judges in the same Federal judicial district.

But there are important issues that weren’t addressed in this case, and important things you need to know to exercise your rights at JFK or other airports — even if judges in future cases in the same or other judicial districts are persuaded by the ruling in this case.
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