The ColRegs consist of 38 Rules grouped as follows:

• General rules (Rules 1-3)
• Steering and Sailing (Rules 4-19)
• Lights and Shapes (Rules 20-31)
• Sound and Light Signals (Rules 32-37)
• Exceptions (Rule 38) plus Annexes

Resources; https://www.navcen.uscg.gov/?pageName=NavRulesAmalgamated