"The Code of Federal Regulations is a codification of the general and permanent rules published in the Federal Register by the Executive departments and agencies of the Federal Government. The Code is divided into 50 titles which represent broad areas subject to Federal regulation. Each title is divided into chapters which usually bear the name of the issuing agency. Each chapter is further subdivided into parts covering specific regulatory areas." Explanation to Code of Federal Regulations, at v (Title 1, 2018).
The Office of the Federal Register revises the CFR on a quarterly basis as follows:
Use the Federal Register to see if a regulation has been revised.