The guidelines are presented in numbered chapters divided into alphabetical parts. The parts are divided into subparts and individual guidelines. Each guideline is identified by three numbers and a letter corresponding to the chapter, part, subpart and individual guideline.
The first number is the chapter, the letter represents the part of the chapter, the second number is the subpart, and the final number is the guideline. Section 2B1.1, for example, is the first guideline in the first subpart in Part B of Chapter Two. Or, §3A1.2 is the second guideline in the first subpart in Part A of Chapter Three. Policy statements are similarly identified.