---
kind: "section"
citation: "1 C.F.R. § 21.11"
title: "1"
number: "21.11"
heading: "Standard organization of the Code of Federal Regulations."
url: "https://uscodex.org/cfr/1/21.11"
---

# §21.11. Standard organization of the Code of Federal Regulations.


The standard organization consists of the following structural units:

- (a) Titles, which are numbered consecutively in Arabic throughout the Code;
- (b) Subtitles, which are lettered consecutively in capitals throughout the title;
- (c) Chapters, which are numbered consecutively in Roman capitals throughout each title;
- (d) Subchapters, which are lettered consecutively in capitals throughout the chapter;
- (e) Parts, which are numbered in Arabic throughout each title;
- (f) Subparts, which are lettered in capitals;
- (g) **Sections, which are numbered in Arabic throughout each part.** A section number includes the number of the part followed by a period and the number of the section. For example, the section number for [section 15](/cfr/1/15.md) of [part 21](/cfr/1/part21.md) is “[§ 21.15](/cfr/1/21.15.md)”; and
- (h) **Paragraphs, which are designated as follows—**

## Notes

### Amendments

[54 FR 9682, Mar. 7, 1989; 54 FR 23343, May 31, 1989]

### 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.

### Amendments

[54 FR 9682, Mar. 7, 1989; 54 FR 23343, May 31, 1989]