The Code of Federal Regulations (CFR) annual edition is the codification of the general and permanent rules published in the Federal Register by the departments and agencies of the Federal Government produced by the Office of the Federal Register (OFR) and the Government Publishing Office.
Download the Code of Federal Regulations in XML.
Parallel Table of Authorities and Rules for the Code of Federal Regulations and the United States Code
Text | PDF
Find, review, and submit comments on Federal rules that are open for comment and published in the Federal Register using Regulations.gov.
Purchase individual CFR titles from the U.S. Government Online Bookstore.
Find issues of the CFR (including issues prior to 1996) at a local Federal depository library.
Electronic Code of Federal Regulations
Title 47: Telecommunication
§42.6 Retention of telephone toll records.
Each carrier that offers or bills toll telephone service shall retain for a period of 18 months such records as are necessary to provide the following billing information about telephone toll calls: the name, address, and telephone number of the caller, telephone number called, date, time and length of the call. Each carrier shall retain this information for toll calls that it bills whether it is billing its own toll service customers for toll calls or billing customers for another carrier.
[51 FR 39536, Oct. 29, 1986]