On August 19, 2014, the Federal Aviation Administration (“FAA”) published a proposed rule regarding “Implementation of Legislative Categorical Exclusion for Environmental Review of Performance Based Navigation Procedures,” 79 Fed.Reg. 49141 (“CATEX Rule”) to implement the Congressional mandate contained in the FAA Modernization and Reform Act of 2012, Pub.L. 112-95 (“FRMA”), § 213, directing FAA “to issue and file a categorical exclusion for any navigation performance or other performance based navigation (PBN) procedure that would result in measureable reductions in fuel consumption, carbon dioxide emissions, and noise on a per flight basis as compared to aircraft operations that follow existing instrument flight rule procedures in the same airspace.” 79 Fed.Reg. 41941.
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