This second volume of 46 CFR contains Parts 41-69 and is regulated by the US Coast Guard.

• Subchapter E—Load Lines
• 41 - [Reserved]
• 42 - Domestic and Foreign Voyages by Sea
• 43 - [Reserved]
• 44 - Special Service Limited Domestic Voyages
• 45 - Great Lakes Load Lines
• 46 - Subdivision Load Lines for Passenger Vessels
• 47 - Combination Load Lines
• Subchapter F—Marine Engineering

• 50 - General Provisions
• 51 - [Reserved]
• 52 - Power Boilers
• 53 - Heating Boilers
• 54 - Pressure Vessels
• 56 - Piping Systems and Appurtenances
• 57 - Welding and Brazing
• 58 - Main and Auxiliary Machinery and Related Systems
• 59 - Repairs to Boilers, Pressure Vessels and Appurtenances
• 60 - [Reserved]
• 61 - Periodic Tests and Inspections
• 62 - Vital System Automation
• 63 - Automatic Auxiliary Boilers
• 64 - Marine Portable Tanks and Cargo Handling Systems
• Subchapter G—Documentation and Measurement of Vessels

• 66 - [Reserved]
• 67 - Documentation of Vessels
• 68 - Documentation of Vessels: Exceptions to Coastwise Qualification
• 69 - Measurement of Vessels

Title 46 of the US Code of Federal Regulations (46 CFR) contains all US regulations dealing with Shipping into, out of, and within the United States. The Title is organized into nine volumes, and the regulations it contains are authored by the US Coast Guard, the Maritime Administration, and the Federal Maritime Commission.