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U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 27, 2025
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Title 14
Chapter I
Part 77
Subpart C - Subpart C—Standards for Determining Obstructions to Air Navigation or Navigational Aids or Facilities
§ 77.13 - Applicability.
§ 77.15 - Scope.
§ 77.17 - Obstruction standards.
§ 77.19 - Civil airport imaginary surfaces.
§ 77.21 - Department of Defense (DOD) airport imaginary surfaces.
§ 77.23 - Heliport imaginary surfaces.
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