The FAA proposed on Friday to severely limit participation in the Block Aircraft Registration Request (Barr) program by requiring those who want their aircraft data blocked when conducting IFR flights in the U.S. to certify that there is a “verifiable threat to person, property or company, including the threat of death, kidnapping or serious bodily harm against an individual, a recent history of violent terrorist activity in the geographic area in which the transportation is provided, or a threat against a company.” Flight tracking services obtain aircraft data through a memorandum of agreement (MOA) with the FAA, while Barr is administered by NBAA on behalf of the FAA. Both NBAA and the National Air Transportation Association are opposing any change in the MOA. NBAA said the new limitation ignores the legitimate need for the Barr program and runs counter to long-established assumptions about the government’s role in the protection of privacy. NATA said the change will unnecessarily expose the private movements of numerous individuals in near-real time. “NBAA sees no reason why our government should want to provide unknown parties–especially those engaged in corporate espionage, or simply those who may wish to do harm to others–with the tools to electronically stalk U.S. citizens or companies on general aviation airplanes,” said NBAA president and CEO Ed Bolen. “We will vigorously oppose this plan.”