{"data":{"id":"us/40-cfr-600.509-12","jurisdiction":"us","citation":"40 CFR 600.509-12","heading":"-12 Voluntary submission of additional data.","body":"(a) The manufacturer may optionally submit data in addition to the data required by the Administrator.\n(b) Additional fuel economy data may be submitted by the manufacturer for any vehicle configuration which is to be tested as required in § 600.507 or for which fuel economy data were previously submitted under paragraph (c) of this section.\n(c) Within a base level, additional fuel economy data may be submitted by the manufacturer for any vehicle configuration which is not required to be tested by § 600.507.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER Q—ENERGY POLICY","PART 600—FUEL ECONOMY AND GREENHOUSE GAS EXHAUST EMISSIONS OF MOTOR VEHICLES","Subpart F—Procedures for Determining Manufacturer's Average Fuel Economy"],"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":"7ccb21b615578a4b1876fb77c07713a7baecc61759e594c01ba0fe4df9d8d069","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-600.507-12","next":"us/40-cfr-600.510-12"},"notice":"GroundRules: Original legal text. Not legal advice."}