CFR›Title 40›Chapter I›Part 425›Subject Group General Provisions ContainsSections § 425.01–§ 425.06CorpusDaily eCFRDisplayed edition2026-10-23Last updated2026-10-23 Sections § 425.01 § 425.01 Applicability. § 425.02 § 425.02 General definitions. § 425.03 § 425.03 Sulfide analytical methods and applicability. § 425.04 § 425.04 Applicability of sulfide pretreatment standards. § 425.05 § 425.05 Compliance dates. § 425.06 § 425.06 Monitoring requirements.