{"data":{"id":"us/40-cfr-1042.520","jurisdiction":"us","citation":"40 CFR 1042.520","heading":"What testing must I perform to establish deterioration factors?","body":"Sections 1042.240 and 1042.245 describe the required methods for testing to establish deterioration factors for an engine family.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER U—AIR POLLUTION CONTROLS","PART 1042—CONTROL OF EMISSIONS FROM NEW AND IN-USE MARINE COMPRESSION-IGNITION ENGINES AND VESSELS","Subpart F—Test Procedures"],"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":"c85042b5e2d84be5bbde86d1fe8aae04fa99c30601dbfe6a05b86c0002715726","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-1042.515","next":"us/40-cfr-1042.525"},"notice":"GroundRules: Original legal text. Not legal advice."}