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Title 49--Transportation
CHAPTER III--FEDERAL HIGHWAY ADMINISTRATION,
DEPARTMENT OF TRANSPORTATION
PART 393--PARTS AND ACCESSORIES NECESSARY FOR SAFE OPERATION
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 | 393.1 | Scope of the rules of this part. |
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| 393.3 | Additional equipment and accessories. |
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| 393.5 | Definitions. |
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| 393.7 | Matter incorporated by reference. |
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| 393.9 | Lamps operable. |
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| 393.11 | Lighting devices and reflectors. |
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| 393.13 | Retroreflective sheeting and reflex reflectors, requirements for semitrailers and trailers manufactured before December 1, 1993. |
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| 393.17 | Lamps and reflectors--combinations in driveaway-towaway operation. |
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| 393.19 | Requirements for turn signaling systems. |
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| 393.20 | Clearance lamps to indicate extreme width and height. |
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| 393.22 | Combination of lighting devices and reflectors. |
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| 393.23 | Lighting devices to be electric. |
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| 393.24 | Requirements for head lamps and auxiliary road lighting lamps. |
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| 393.25 | Requirements for lamps other than head lamps. |
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| 393.26 | Requirements for reflectors. |
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| 393.27 | Wiring specifications. |
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| 393.28 | Wiring to be protected. |
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| 393.29 | Grounds. |
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| 393.30 | Battery installation. |
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| 393.31 | Overload protective devices. |
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| 393.32 | Detachable electrical connections. |
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| 393.33 | Wiring, installation. |
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| 393.40 | Required brake systems. |
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| 393.41 | Parking brake system. |
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| 393.42 | Brakes required on all wheels. |
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| 393.43 | Breakaway and emergency braking. |
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| 393.44 | Front brake lines, protection. |
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| 393.45 | Brake tubing and hose, adequacy. |
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| 393.46 | Brake tubing and hose connections. |
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| 393.47 | Brake lining. |
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| 393.48 | Brakes to be operative. |
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| 393.49 | Single valve to operate all brakes. |
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| 393.50 | Reservoirs required. |
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| 393.51 | Warning devices and gauges. |
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| 393.52 | Brake performance. |
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| 393.53 | Automatic brake adjusters and brake adjustment indicators. |
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| 393.55 | Antilock brake systems. |
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| 393.60 | Glazing in specified openings. |
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| 393.61 | Window construction. |
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| 393.62 | Window obstructions. |
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| 393.63 | Windows, markings. |
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| 393.65 | All fuel systems. |
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| 393.67 | Liquid fuel tanks. |
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| 393.69 | Liquefied petroleum gas systems. |
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| 393.70 | Coupling devices and towing methods, except for driveaway-towaway operations. |
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| 393.71 | Coupling devices and towing methods, driveaway-towaway operations. |
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| 393.75 | Tires. |
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| 393.76 | Sleeper berths. |
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| 393.77 | Heaters. |
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| 393.78 | Windshield wipers. |
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| 393.79 | Defrosting device. |
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| 393.80 | Rear-vision mirrors. |
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| 393.81 | Horn. |
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| 393.82 | Speedometer. |
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| 393.83 | Exhaust systems. |
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| 393.84 | Floors. |
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| 393.86 | Rear impact guards and rear end protection. |
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| 393.87 | Flags on projecting loads. |
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| 393.88 | Television receivers. |
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| 393.89 | Buses, driveshaft protection. |
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| 393.90 | Buses, standee line or bar. |
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| 393.91 | Buses, aisle seats prohibited. |
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| 393.92 | Buses, marking emergency doors. |
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| 393.93 | Seats, seat belt assemblies, and seat belt assembly anchorages. |
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| 393.94 | Vehicle interior noise levels. |
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| 393.95 | Emergency equipment on all power units. |
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| 393.100 | General rules for protection against shifting or falling cargo. |
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| 393.102 | Securement systems. |
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| 393.104 | Blocking and bracing. |
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| 393.106 | Front-end structure. |
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| 393.201 | Frames. |
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| 393.203 | Cab and body components. |
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| 393.205 | Wheels. |
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| 393.207 | Suspension systems. |
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| 393.209 | Steering wheel systems. |
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