CFR > Title 40 - Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS (Parts 400–471) > PART 413—ELECTROPLATING POINT SOURCE CATEGORY > SUBPART F—Chemical Etching and Milling Subcategory (§413.60 to §413.64) > 413.60—Applicability: Description of the chemical etching and milling subcategory.