{"data":{"id":"us/40-cfr-610.60","jurisdiction":"us","citation":"40 CFR 610.60","heading":"Non-standard ambient conditions.","body":"(a) Extreme temperatures. For vehicles required to be tested at extreme temperatures, the test sequence described in § 610.41 will be performed using either test track or dynamometer, in ambient temperatures outside the 60° to 90° range specified in § 610.64 as determined by the Administrator. The driveability tests described in § 610.62 may also be performed at non-standard temperatures, as determined to be necessary by the Administrator.\n(b) High altitudes. Vehicles required to be tested at high altitudes will undergo the tests described in § 610.43 if necessary, on either test track or dynamometer as determined by the Administrator. One test location, at an elevation of no less than 4000 feet, will be selected.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER Q—ENERGY POLICY","PART 610—FUEL ECONOMY RETROFIT DEVICES","Subpart F—Special 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":"d7b983f6e94ff9f81fd5dc6ef8e55233b3f177a03bc8f51a6c5b15836a828cfa","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-610.52","next":"us/40-cfr-610.61"},"notice":"GroundRules: Original legal text. Not legal advice."}