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U.S. Code of Federal Regulations
Regulations most recently checked for updates: Jan 21, 2026
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Title 47
Chapter I
Part 87
Subpart O - Subpart O—Airport Control Tower Stations
§ 87.417 -
§ 87.419 - Supplemental eligibility.
§ 87.421 - Frequencies.
§ 87.423 - Hours of operation.
§ 87.425 - Interference.
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