This fourth volume of 46 CFR contains Parts 90-139 and is regulated by the US Coast Guard.

• Subchapter I—Cargo and Miscellaneous Vessels
• Part 90 - General Provisions
• Part 91 - Inspection and Certification
• Part 92 - Construction and Arrangement
• Part 93 - Stability
• Part 95 - Fire Protection Equipment
• Part 96 - Vessel Control and Miscellaneous Systems and Equipment
• Part 97 - Operations
• Part 98 - Special Construction, Arrangement, and Other Provisions for Certain Dangerous Cargoes in Bulk
• Part 105 - Commercial Fishing Vessels Dispensing Petroleum Products
• Subchapter I-A—Mobile Offshore Drilling Units
• Part 107 - Inspection and Certification
• Part 108 - Design and Equipment
• Part 109 - Operations
• Subchapter J—Electrical Engineering
• Part 110 - General Provisions
• Part 111 - Electric Systems: General Requirements
• Part 112 - Emergency Lighting and Power Systems
• Part 113 - Communication and Alarm Systems and Equipment
• Subchapter K—Small Passenger Vessels Carrying More Than 150 Passengers or With Overnight Accommodations for More Than 49 Passengers
• Part 114 - General Provisions
• Part 115 - Inspection and Certification
• Part 116 - Construction and Arrangement
• Part 117 - Lifesaving Equipment and Arrangements
• Part 118 - Fire Protection Equipment
• Part 119 - Machinery Installation
• Part 120 - Electrical Installation
• Part 121 - Vessel Control and Miscellaneous Systems and Equipment
• Part 122 - Operations
• Parts 123–124 - [Reserved]
• Subchapter L—Offshore Supply Vessels
• Part 125 - General
• Part 126 - Inspection and Certification
• Part 127 - Construction and Arrangements
• Part 128 - Marine Engineering: Equipment and Systems
• Part 129 - Electrical Installations
• Part 130 - Vessel Control, and Miscellaneous Equipment and Systems
• Part 131 - Operations
• Part 132 - Fire-Protection Equipment
• Part 133 - Lifesaving Systems
• Part 134 - Added Provisions for Liftboats
• Parts 135–139 - [Reserved]

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.