StacksVerified U.S. regulatory reference

40 CFR §57.505

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
An NSO shall be amended within three months of submission of any report required under § 57.504 so as to require additional fugitive emission control measures if such report establishes that such additional measures are necessary to assure that the NAAQS will be maintained with a reasonable degree of reliability.