CFR > Title 40 - Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER Q—ENERGY POLICY (Parts 600–611) > PART 600—FUEL ECONOMY AND CARBON-RELATED EXHAUST EMISSIONS OF MOTOR VEHICLES > SUBPART D—Fuel Economy Regulations for 1977 and Later Model Year Automobiles—Labeling (§600.301-08 to §600.316-78) > 600.304-77—Section numbering, construction.