US lawFederal (United States)RegulationsTitle 40 CFR — Protection of EnvironmentChapter I — ENVIRONMENTAL PROTECTION AGENCYPart 257 — CRITERIA FOR CLASSIFICATION OF SOLID WASTE DISPOSAL FACILITIES AND PRACTICESSubpart A — Classification of Solid Waste Disposal Facilities and Practices257.440 C.F.R. § 257.4Effective date.Last amended: 2016Year: 2026Length: 7 wordsOfficial source Cite as 40 C.F.R. § 257.4 (2026)These criteria become effective October 15, 1979.Previous40 C.F.R. § 257.3-8