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U.S. Code of Federal Regulations
Regulations most recently checked for updates: Sep 16, 2025
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Title 33
Chapter I
Part 166
Subpart A - Subpart A—General
§ 166.100 - Purpose.
§ 166.103 - Geographic coordinates.
§ 166.105 - Definitions.
§ 166.110 - Modification of areas.
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