CFR›Title 16›Chapter I›Part 259 ContainsSections 259.1–259.4CorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 PART 259—GUIDE CONCERNING FUEL ECONOMY ADVERTISING FOR NEW AUTOMOBILES Sections 259.1 § 259.1 Purpose. 259.2 § 259.2 Definitions. 259.3 § 259.3 Qualifications and disclosures. 259.4 § 259.4 Advertising guidance. Authority15 U.S.C. 41-58.Source82 FR 43687, Sept. 19, 2017, unless otherwise noted. Previous 255 Part 255—Guides Concerning Use of Endorsements and Testimonials in Advertising Next 260 Part 260—Guides for the Use of Environmental Marketing Claims