| Part | Regulation | Guidance |
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393.1 - 393.7
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Subpart A—General
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393.1
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Scope of the rules in this part.
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393.3
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Additional equipment and accessories.
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393.5
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Definitions.
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393.7
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Matter incorporated by reference.
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393.9 - 393.31
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Subpart B—Lamps, reflective devices and electrical wiring
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393.9
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Lamps operable, prohibition of obstructions of lamps and reflectors.
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393.11
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Lamps and reflective devices.
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Yes
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393.13
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Retroreflective sheeting and reflex reflectors, requirements for semitrailers and trailers manufactured before December 1, 1993.
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393.17
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Lamps and reflectors-combinations in driveaway-towaway operation.
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Yes
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393.19
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Hazard warning signals.
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393.20
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[Reserved]
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393.22
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Combination of lighting devices and reflectors.
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393.23
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Power supply for lamps.
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393.24
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Requirements for head lamps, auxiliary driving lamps and front fog lamps.
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Yes
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393.25
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Requirements for lamps other than head lamps.
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Yes
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393.26
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Requirements for reflex reflectors.
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393.27
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[Reserved]
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393.28
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Wiring systems.
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Yes
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393.29
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[Reserved]
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393.30
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Battery installation.
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393.31
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§–393.33 [Reserved]
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Yes
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393.40 - 393.55
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Subpart C—Brakes
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393.40
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Required brake systems.
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Yes
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393.41
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Parking brake system.
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Yes
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393.42
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Brakes required on all wheels.
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Yes
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393.43
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Breakaway and emergency braking.
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Yes
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393.44
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Front brake lines, protection.
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Yes
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393.45
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Brake tubing and hoses; hose assemblies and end fittings.
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393.46
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[Reserved]
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393.47
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Brake actuators, slack adjusters, linings/pads and drums/rotors.
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393.48
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Brakes to be operative.
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Yes
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393.49
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Control valves for brakes.
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393.50
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Reservoirs required.
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393.51
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Warning signals, air pressure and vacuum gauges.
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Yes
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393.52
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Brake performance.
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Yes
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393.53
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Automatic brake adjusters and brake adjustment indicators.
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393.55
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Antilock brake systems.
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393.60 - 393.63
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Subpart D—Glazing and window construction
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393.60
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Glazing in specified openings.
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Yes
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393.61
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Truck and truck tractor window construction.
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Yes
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393.62
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Emergency exits for buses.
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Yes
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393.63
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[Reserved]
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393.65 - 393.69
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Subpart E—Fuel systems
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393.65
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All fuel systems.
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Yes
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393.67
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Liquid fuel tanks.
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Yes
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393.68
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Compressed natural gas fuel containers.
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393.69
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Liquefied petroleum gas systems.
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393.70 - 393.71
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Subpart F—Coupling devices and towing methods
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393.70
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Coupling devices and towing methods, except for driveaway-towaway operations.
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Yes
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393.71
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Coupling devices and towing methods, driveaway-towaway operations.
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Yes
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393.75 - 393.94
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Subpart G—Miscellaneous parts and accessories
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393.75
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Tires.
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Yes
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393.76
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Sleeper berths.
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Yes
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393.77
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Heaters.
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393.78
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Windshield wiping and washing systems.
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Yes
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393.79
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Windshield defrosting and defogging systems.
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393.80
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Rear-vision mirrors.
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393.81
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Horn.
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Yes
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393.82
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Speedometer.
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Yes
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393.83
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Exhaust systems.
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Yes
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393.84
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Floors.
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393.85
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[Reserved]
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393.86
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Rear impact guards and rear end protection.
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393.87
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Warning flags on projecting loads.
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Yes
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393.88
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Television receivers.
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Yes
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393.89
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Buses, driveshaft protection.
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Yes
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393.90
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Buses, standee line or bar.
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393.91
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Buses, aisle seats prohibited.
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393.92
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[Reserved]
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Yes
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393.93
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Seats, seat belt assemblies, and seat belt assembly anchorages.
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Yes
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393.94
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Interior noise levels in power units.
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393.95 - 393.95
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Subpart H—Emergency equipment
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393.95
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Emergency equipment on all power units.
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Yes
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393.100 - 393.136
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Subpart I—Protection against shifting and falling cargo
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393.100
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Which types of commercial motor vehicles are subject to the cargo securement standards of this subpart, and what general requirements apply?
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Yes
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393.102
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What are the minimum performance criteria for cargo securement devices and systems?
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Yes
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393.104
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What standards must cargo securement devices and systems meet in order to satisfy the requirements of this subpart?
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393.106
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What are the general requirements for securing articles of cargo?
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Yes
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393.108
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How is the working load limit of a tiedown, or the load restraining value of a friction mat, determined?
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393.110
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What else do I have to do to determine the minimum number of tiedowns?
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393.112
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Must a tiedown be adjustable?
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393.114
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What are the requirements for front end structures used as part of a cargo securement system?
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393.116
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What are the rules for securing logs?
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393.118
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What are the rules for securing dressed lumber or similar building products?
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393.120
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What are the rules for securing metal coils?
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393.122
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What are the rules for securing paper rolls?
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393.124
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What are the rules for securing concrete pipe?
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393.126
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What are the rules for securing intermodal containers?
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393.128
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What are the rules for securing automobiles, light trucks and vans?
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393.130
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What are the rules for securing heavy vehicles, equipment and machinery?
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Yes
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393.132
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What are the rules for securing flattened or crushed vehicles?
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393.134
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What are the rules for securing roll-on/roll-off or hook lift containers?
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393.136
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What are the rules for securing large boulders?
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393.201 - 393.209
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Subpart J—Frames, cab and body components, wheels, steering, and suspension systems
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393.201
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Frames.
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Yes
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393.203
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Cab and body components.
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393.205
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Wheels.
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393.207
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Suspension systems.
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393.209
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Steering wheel systems.
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