CFR›Title 16›Chapter I›Part 1›Subpart A ContainsSubject groups Advisory Opinions–Industry GuidesCorpusDaily eCFRDisplayed edition2026-04-24Last updated2026-04-24 Subpart A—Industry Guidance Subject Groups Advisory Opinions Advisory Opinions Sections 1.1–1.4 Industry Guides Industry Guides Sections 1.5–1.6 Authority15 U.S.C. 46, unless otherwise noted. Next B Subpart B—Rules and Rulemaking Under Section 18(a)(1)(B) of the FTC Act