{"data":{"id":"us/40-cfr-421.270","jurisdiction":"us","citation":"40 CFR 421.270","heading":"Applicability: Description of the primary rare earth metals subcategory.","body":"The provisions of this subpart are applicable to discharges resulting from the production of rare earth metals and mischmetal by primary rare earth metals facilities processing rare earth metal oxides, chlorides, and fluorides.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS","PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY","Subpart Y—Primary Rare Earth Metals Subcategory"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"196d26ec26b22769626f9ff6c9b72b9f485249e08c69e8af29c14281bb48b4c8","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-421.267","next":"us/40-cfr-421.271"},"notice":"GroundRules: Original legal text. Not legal advice."}