A more thorough explanation:

The Code of Federal Regulations (CFR) is a collection of the federal government's rules and regulations that are published in the Federal Register. It is published annually by the Office of the Federal Register and the Government Publishing Office. The CFR includes the final and effective rules of Federal agencies and any related official interpretations of the rules. It does not contain preambles, proposed rules, notices, or general policy statements found in the Federal Register.

The CFR was created with the passage of the Federal Register Act and amended in 1937 to provide a “codification” of all regulations every five years. It reflects the tenet that the federal government must follow an open public process when rulemaking. The United States Constitution permits federal agencies to promulgate rules to enable Congress’ legislation. This rulemaking process is governed by the Administrative Procedure Act.

The CFR is divided into 50 titles, each of which is assigned chapters within the titles. The standard organization of a title consists of chapters, subchapters, parts, sections, and paragraphs. The CFR’s 50 titles are divided by subject areas, such as Agriculture, Commerce and Foreign Trade, Education, and Public Health.

• The CFR includes rules and regulations related to food safety, such as the Food and Drug Administration's regulations on food labeling and packaging.
• The CFR also includes rules and regulations related to workplace safety, such as the Occupational Safety and Health Administration's regulations on hazardous materials handling.

These examples illustrate how the CFR contains the final and effective rules of Federal agencies and any related official interpretations of the rules. They also show how the CFR covers a wide range of subject areas that affect people's daily lives.