{"data":{"id":"us/14-cfr-77.31","jurisdiction":"us","citation":"14 CFR 77.31","heading":"Determinations.","body":"(a) The FAA will issue a determination stating whether the proposed construction or alteration would be a hazard to air navigation, and will advise all known interested persons.\n(b) The FAA will make determinations based on the aeronautical study findings and will identify the following:\n(1) The effects on VFR/IFR aeronautical departure/arrival operations, air traffic procedures, minimum flight altitudes, and existing, planned, or proposed airports listed in § 77.15(e) of which the FAA has received actual notice prior to issuance of a final determination.\n(2) The extent of the physical and/or electromagnetic effect on the operation of existing or proposed air navigation facilities, communication aids, or surveillance systems.\n(c) The FAA will issue a Determination of Hazard to Air Navigation when the aeronautical study concludes that the proposed construction or alteration will exceed an obstruction standard and would have a substantial aeronautical impact.\n(d) A Determination of No Hazard to Air Navigation will be issued when the aeronautical study concludes that the proposed construction or alteration will exceed an obstruction standard but would not have a substantial aeronautical impact to air navigation. A Determination of No Hazard to Air Navigation may include the following:\n(1) Conditional provisions of a determination.\n(2) Limitations necessary to minimize potential problems, such as the use of temporary construction equipment.\n(3) Supplemental notice requirements, when required.\n(4) Marking and lighting recommendations, as appropriate.\n(e) The FAA will issue a Determination of No Hazard to Air Navigation when a proposed structure does not exceed any of the obstruction standards and would not be a hazard to air navigation.","path":["Title 14—Aeronautics and Space","CHAPTER I—FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER E—AIRSPACE","PART 77—SAFE, EFFICIENT USE, AND PRESERVATION OF THE NAVIGABLE AIRSPACE","Subpart D—Aeronautical Studies and Determinations"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-14.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:20Z","sha256":"121380f8b3cb469384c8367c37413767a5640af949fe07375e77fff0bd5e9cc4","source_id":"us-cfr","stale":true,"prev":"us/14-cfr-77.29","next":"us/14-cfr-77.33"},"notice":"GroundRules: Original legal text. Not legal advice."}