•The Code is organized into chapters, each relating to a different topic and several annexes that contain supplemental information. The contents are organized into four main categories:
The Administrative chapters use the “ones.” Chapters 1 through 9.
The Support chapters use the “teens,” Chapters 10 through 19.
The System chapters use the “twenties,“ Chapters 20 through 29.
The code also has Usability Annexes A through G. In order to create and maintain this grouping, the code does not actually use all 29 chapter numbers. In fact, only 15 are currently used. Unused chapters are identified as ”reserved.”