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Regulations last checked for updates: Dec 14, 2025
Title 40 - Protection of Environment last revised: Dec 05, 2025
All Titles
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.
authority:
Secs. 110, 114, 119, 301, Clean Air Act, as amended (
42 U.S.C. 7410
,
7414
,
7419
,
and
; sec. 406 of Pub. L. 95-95
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