---
kind: "section"
citation: "1 C.F.R. § 21.9"
title: "1"
number: "21.9"
heading: "Parts, subparts, and undesignated center heads."
url: "https://uscodex.org/cfr/1/21.9"
---

# §21.9. Parts, subparts, and undesignated center heads.

- (a) The normal divisions of a chapter are parts, consisting of a unified body of regulations applying to a specific function of an issuing agency or devoted to specific subject matter under the control of that agency.
- (b) Subparts or undesignated center heads may be used to group related sections within a part. Undesignated center heads may also be used to group sections within a subpart.

## Notes

### Authority

Authority: 44 U.S.C. 1506; sec. 6, E.O. 10530, 19 FR 2709; 3 CFR, 1954-1958 Comp., p. 189.

### Source

Source: 37 FR 23611, Nov. 4, 1972, unless otherwise noted.