CFR›Title 47›Chapter I›Part 9›Subpart F ContainsSections 9.15–9.17CorpusDaily eCFRDisplayed edition2026-04-27Last updated2026-04-27 Subpart F—Multi-Line Telephone Systems Sections 9.15 § 9.15 Applicability. 9.16 § 9.16 General obligations—direct 911 dialing, notification, and dispatchable location. 9.17 § 9.17 Enforcement, compliance date, State law. Previous E Subpart E—Telecommunications Relay Services for Persons with Disabilities Next G Subpart G—Mobile-Satellite Service