The Code of Federal Regulations is the codification of the general and permanent rules published in the Federal Register by the executive departments and agencies of the Federal Government.

A full set of the CFR consists of approximately 200 volumes. 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
Titles 42 -- 50 as of October 1