This document provides an overview of the Code of Federal Regulations (CFR). It discusses that the CFR is the codification of general and permanent rules published by the US government. It is divided into 50 titles by subject area. Title 21 is focused on food and drugs and administered by the FDA. The document outlines the publication process and provides examples of regulations within Title 21, including those pertaining to food labeling, drug approvals, medical devices, and controlled substances.