CFR›Title 40›Chapter I›Part 413›Subpart F ContainsSections 413.60–413.64CorpusDaily eCFRDisplayed edition2026-04-27Last updated2026-04-27 Subpart F—Chemical Etching and Milling Subcategory Sections 413.60 § 413.60 Applicability: Description of the chemical etching and milling subcategory. 413.61 § 413.61 Specialized definitions. 413.62-413.63 §§ 413.62-413.63 [Reserved] 413.64 § 413.64 Pretreatment standards for existing sources. Previous E Subpart E—Coatings Subcategory Next G Subpart G—Electroless Plating Subcategory