{"data":{"id":"us/40-cfr-1066.290","jurisdiction":"us","citation":"40 CFR 1066.290","heading":"Verification of speed accuracy for the driver's aid.","body":"Use good engineering judgment to provide a driver's aid that facilitates compliance with the requirements of § 1066.425. Verify the speed accuracy of the driver's aid as described in § 1066.235.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER U—AIR POLLUTION CONTROLS","PART 1066—VEHICLE-TESTING PROCEDURES","Subpart C—Dynamometer Specifications"],"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":"6024d8f8736e9fd2082bec74f48206be94040ae3cf420e3a8794a7eaae830980","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-1066.275","next":"us/40-cfr-1066.301"},"notice":"GroundRules: Original legal text. Not legal advice."}