CFR›Title 40›Chapter I›Part 413›Subpart B ContainsSections 413.20–413.24CorpusDaily eCFRDisplayed edition2026-06-08Last updated2026-06-08 Subpart B—Electroplating of Precious Metals Subcategory Sections 413.20 § 413.20 Applicability: Description of the electroplating of precious metals subcategory. 413.21 § 413.21 Specialized definitions. 413.22-413.23 §§ 413.22-413.23 [Reserved] 413.24 § 413.24 Pretreatment standards for existing sources. Previous A Subpart A—Electroplating of Common Metals Subcategory Next D Subpart D—Anodizing Subcategory