{"identifier":"14","label":"Title 14—Aeronautics and Space","label_level":"Title 14","label_description":"Aeronautics and Space","reserved":false,"type":"title","size":16963154,"children":[{"identifier":"I","label":" Chapter I—Federal Aviation Administration, Department of Transportation","label_level":" Chapter I","label_description":"Federal Aviation Administration, Department of Transportation","reserved":false,"type":"chapter","size":12375314,"children":[{"identifier":"E","label":"Subchapter E—Airspace","label_level":"Subchapter E","label_description":"Airspace","reserved":false,"type":"subchapter","size":77168,"children":[{"identifier":"71","label":"Part 71—Designation of Class A, B, C, D, and E Airspace Areas; Air Traffic Service Routes; and Reporting Points","label_level":"Part 71","label_description":"Designation of Class A, B, C, D, and E Airspace Areas; Air Traffic Service Routes; and Reporting 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