U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 28, 2025

All TitlesTitle 33Chapter IPart 67Subpart 67.25 - Subpart 67.25—Class “B” Requirements
§ 67.25-1 - Class “B” structures.
§ 67.25-5 - Obstruction lights.
§ 67.25-10 - Sound signal.
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