The standard organization consists of the following structural units:
Titles, which are numbered consecutively in Arabic throughout the Code;
Subtitles, which are lettered consecutively in capitals throughout the title;
Chapters, which are numbered consecutively in Roman capitals throughout each title;
Subchapters, which are lettered consecutively in capitals throughout the chapter;
Parts, which are numbered in Arabic throughout each title;
Subparts, which are lettered in capitals;
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
Paragraphs, which are designated as follows: