{"data":{"id":"us/40-cfr-1048.425","jurisdiction":"us","citation":"40 CFR 1048.425","heading":"What records must I keep?","body":"(a) Organize and maintain your records as described in this section. We may review your records at any time.\n(b) Keep paper records of your in-use testing for one full year after you complete all the testing required for an engine family in a model year. You may use any additional storage formats or media if you like.\n(c) Keep a copy of the written reports described in § 1048.420.\n(d) Keep any additional records related to the procurement process.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER U—AIR POLLUTION CONTROLS","PART 1048—CONTROL OF EMISSIONS FROM NEW, LARGE NONROAD SPARK-IGNITION ENGINES","Subpart E—Testing In-use Engines"],"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":"815eee0e683435d06236a162cd261616c85b58937834fe31baae2a6ab56a29ff","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-1048.420","next":"us/40-cfr-1048.501"},"notice":"GroundRules: Original legal text. Not legal advice."}