The Code of Federal Regulations (CFR) is the codification of the general and permanent rules published in the Federal Register by the executive departments and agencies of the Federal Government. It is divided into 50 titles that represent broad areas subject to Federal regulation.
Each volume of the CFR is updated once each calendar year and is issued on a quarterly basis.
Titles 1-16 are updated as of January 1st
Titles 17-27 are updated as of April 1st
Titles 28-41 are updated as of July 1st
Titles 42-50 are updated as of October 1st