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U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 27, 2025
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Title 40
Chapter I
Part 57
Subpart D - Subpart D—Supplementary Control System Requirements
§ 57.401 - General requirements.
§ 57.402 - Elements of the supplementary control system.
§ 57.403 - Written consent.
§ 57.404 - Measurements, records, and reports.
§ 57.405 - Formulation, approval, and implementation of requirements.
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