{"data":{"id":"us/40-cfr-257.4","jurisdiction":"us","citation":"40 CFR 257.4","heading":"Effective date.","body":"These criteria become effective October 15, 1979.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER I—SOLID WASTES","PART 257—CRITERIA FOR CLASSIFICATION OF SOLID WASTE DISPOSAL FACILITIES AND PRACTICES","Subpart A—Classification of Solid Waste Disposal Facilities and Practices"],"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":"a5c67150387a7c98511702b023f9a3b3108b028a726631841f16400d90380f94","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-257.3-8","next":"us/40-cfr-257.5"},"notice":"GroundRules: Original legal text. Not legal advice."}