Mealey's (May 25, 2022, 7:57 AM EDT) -- SAN FRANCISCO — More than 4-1/2 years after two electronic communications service providers (ECSPs) asked the Ninth Circuit U.S. Court of Appeals to rethink its 2017 decision upholding the constitutionality of the nondisclosure requirement of national security letters (NSLs) used by the Federal Bureau of Investigation to gather information on their customers, a panel on May 11 denied rehearing or rehearing en banc....