U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 27, 2025
Subpart A - Subpart A [Reserved]
Subpart C - Subpart C [Reserved]
Subpart D [§ 64.401 - § 64.402] - Subpart D—Procedures for Handling Priority Services in Emergencies
Subpart E - Subpart E [Reserved]
Subpart O [§ 64.1501 - § 64.1515] - Subpart O—Interstate Pay-Per-Call and Other Information Services
Subpart AA - Subpart AA [Reserved]