Standard organization of the Code of Federal Regulations.

§ 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 of part 21 is “§ 21.15”; and (h) Paragraphs, which are designated as follows: level 1 (a), (b), (c), etc. level 2 (1), (2), (3), etc. level 3 (i), (ii), (iii), etc. level 4 (A), (B), (C), etc. level 5 ( 1 ), ( 2 ), ( 3 ), etc. level 6 ( i ), ( ii ), ( iii ), etc. [54 FR 9682, Mar. 7, 1989; 54 FR 23343, May 31, 1989]