The Code of Federal Regulations regularly assigns the title of [Reserved] to many titles, sub-parts, and chapters within the entire book of regulations. This status is used as a placeholder for future law to be written. Typically, it is especially used in parts of the law that are anticipated to be changing or expanding.
The “Reserved” status leaves room for growth in the CFR & eCFR.
The Code of Federal Regulations (CFR) is the codification of the general and permanent rules and regulations (sometimes called administrative law) published in the Federal Register by the executive departments and agencies of the federal government of the United States.
The electronic format of this code is sometimes referred to as the e-CFR or eCFR. Access the Code of Federal Regulations.
The CFR currently is composed of 50 titles comprised of everything from emissions regulations to tobacco tax. Some of the regulations (including title 35 and many sub-parts) are given only the title of “reserved” indicating they can be added to later.