49 U.S.C. § 44719 : US Code - Section 44719: Standards for navigational aids

Search 49 U.S.C. § 44719 : US Code - Section 44719: Standards for navigational aids

The Secretary of Transportation shall prescribe regulations on
standards for installing navigational aids, including airport
control towers. For each type of facility, the regulations shall
consider at a minimum traffic density (number of aircraft
operations without consideration of aircraft size), terrain and
other obstacles to navigation, weather characteristics, passengers
served, and potential aircraft operating efficiencies.