The Code of Federal Regulations (CFR) is an annual codification of the general and permanent rules published in the Federal Register by the executive departments and agencies of the Federal Government. The purpose of the CFR is to present the official and complete text of agency regulations in one organized publication and to provide a comprehensive and convenient reference for all those who may need to know the text of general and permanent Federal regulations.
The CFR is divided into 50 titles representing broad areas subject to Federal regulation. Each Title is divided into chapters that are assigned to agencies issuing regulations pertaining to that broad subject area. Each chapter is divided into parts and each part is then divided into sections -- the basic unit of the CFR. The approximately 200 CFR volumes are revised at least once a year on a quarterly basis as follows: Titles 1 -- 16 as of January 1; Titles 17 -- 27 as of April 1; Titles 28 -- 41 as of July 1; and Titles 42 -- 50 as of October 1.