There are 50 titles of the CFR, each of which represent broad areas that are subject to federal regulation. The title number lets your readers know which broad area the regulation addresses. The Bluebook abbreviation for the CFR uses the first letters of each noun in the title. Place periods after each letter. Do not put spaces between the initials. Type a space after the last initial period, then type the section symbol (§). Type another space, and then provide the specific number for the section you want to cite. The date of the code is listed at the top of the page, for online versions, or on the spine of the volume, for print versions. Type a space, then type the year of the code in parentheses.  Unless you are studying the evolution of a particular regulation and need to cite a historical version, use the most recent code edition available. This ensures you're citing the most up-to-date version of the regulation. Bluebook style cites to the canonical version of the law, not the specific version that you consulted. However, providing the year allows your readers to access the exact wording of the regulation that you used. The Bluebook uses sequential footnotes for in-text citations. Legal writing does not normally have a bibliography or reference list following the work. If your instructor or supervisor wants you to include a bibliography or reference list, the format for a CFR citation does not change. However, your instructor or supervisor may want you to include the title of the regulation, or other information, in the full reference.

Summary:
Identify the title number for the regulation. Use the appropriate abbreviation for the Code of Federal Regulations. List the specific section cited. Provide the date of the code edition. Use the same format for your bibliography.