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Pick a part and two dates. Every section whose wording changed in between is listed with a link to the exact diff. Built for the deposition question "has this rule changed since the crash?"
Part 393 — Parts and Accessories Necessary for Safe Operation
Between Oct. 1, 2011 and today (current through Oct. 15, 2026): 42 amended, 0 added, 0 removed, 48 unchanged.
Oct. 1, 2011 falls before day-level history begins (Jan. 1, 2017). It is read from the annual CFR edition in force that day (revised as of October 1), so an amendment that took effect earlier in that edition year is counted as already in place. Federal Register citations on each section give exact effective dates.
- Amended§ 393.1 Scope of the rules in this part.View diffChanged Oct. 1, 2016
- Amended§ 393.3 Additional equipment and accessories.View diffChanged Oct. 1, 2013
- Amended§ 393.5 Definitions.View diffChanged 7 times: Oct. 1, 2016; Jan. 1, 2017; Nov. 9, 2021; Dec. 9, 2021; March 7, 2022; May 6, 2022; Nov. 18, 2024
- Amended§ 393.7 Matter incorporated by reference.View diffChanged 2 times: Oct. 1, 2012; Oct. 1, 2015
- Amended§ 393.11 Lamps and reflective devices.View diffChanged 5 times: Oct. 1, 2012; Oct. 1, 2013; Oct. 1, 2016; Jan. 1, 2017; March 23, 2026
- Amended§ 393.17 Lamps and reflectors—combinations in driveaway-towaway operation.View diffChanged 2 times: Oct. 1, 2012; Oct. 1, 2015
- Amended§ 393.42 Brakes required on all wheels.View diffChanged 3 times: Oct. 1, 2012; Feb. 19, 2026; March 23, 2026
- Amended§ 393.45 Brake tubing and hoses; hose assemblies and end fittings.View diffChanged July 21, 2026
- Amended§ 393.47 Brake actuators, slack adjusters, linings/pads and drums/rotors.View diffChanged 2 times: Oct. 1, 2012; Oct. 14, 2021
- Amended§ 393.49 Control valves for brakes.View diffChanged Oct. 1, 2013
- Amended§ 393.52 Brake performance.View diffChanged 2 times: Oct. 1, 2012; Jan. 1, 2017
- Amended§ 393.53 Automatic brake adjusters and brake adjustment indicators.View diffChanged Oct. 1, 2012
- Amended§ 393.60 Glazing in specified openings.View diffChanged 7 times: Oct. 1, 2016; Jan. 1, 2017; May 17, 2018; June 18, 2018; March 7, 2022; May 6, 2022; May 9, 2022
- Amended§ 393.65 All fuel systems.View diffChanged 2 times: Feb. 19, 2026; March 23, 2026
- Amended§ 393.67 Liquid fuel tanks.View diffChanged 3 times: Oct. 1, 2013; Feb. 19, 2026; March 23, 2026
- Amended§ 393.71 Coupling devices and towing methods, driveaway-towaway operations.View diffChanged 5 times: Oct. 1, 2012; Oct. 1, 2013; Oct. 1, 2015; Jan. 1, 2017; Oct. 14, 2021
- Amended§ 393.75 Tires.View diffChanged 3 times: Oct. 1, 2016; Feb. 19, 2026; March 23, 2026
- Amended§ 393.77 Heaters.View diffChanged 2 times: Oct. 1, 2012; Oct. 1, 2013
- Amended§ 393.80 Rear-vision mirrors.View diffChanged Jan. 1, 2017
- Amended§ 393.86 Rear impact guards and rear end protection.View diffChanged 4 times: Nov. 9, 2021; Dec. 9, 2021; Feb. 19, 2026; March 23, 2026
- Amended§ 393.95 Emergency equipment on all power units.View diffChanged 5 times: Oct. 1, 2013; Oct. 1, 2015; Feb. 19, 2026; March 23, 2026; April 20, 2026
- Amended§ 393.100 Applicability and general requirements of cargo securement standards.View diffChanged Nov. 18, 2024
- Amended§ 393.102 Minimum performance criteria for cargo securement devices and systems.View diffChanged 2 times: Oct. 1, 2013; Nov. 18, 2024
- Amended§ 393.104 Standards for cargo securement devices and systems.View diffChanged 2 times: Oct. 1, 2013; Nov. 18, 2024
- Amended§ 393.106 General requirements for securing articles of cargo.View diffChanged Nov. 18, 2024
- Amended§ 393.108 Determining the working load limit of a tiedown or the load restraining value of a friction mat.View diffChanged Nov. 18, 2024
- Amended§ 393.110 Additional requirements for determining the minimum number of tiedowns.View diffChanged Nov. 18, 2024
- Amended§ 393.112 Adjustability of tiedowns.View diffChanged Nov. 18, 2024
- Amended§ 393.114 Requirements for front end structures used as part of a cargo securement system.View diffChanged Nov. 18, 2024
- Amended§ 393.116 Specific securement requirements for logs.View diffChanged Nov. 18, 2024
- Amended§ 393.118 Specific securement requirements for dressed lumber and similar building products.View diffChanged 2 times: Oct. 1, 2013; Nov. 18, 2024
- Amended§ 393.120 Specific securement requirements for metal coils.View diffChanged 2 times: Oct. 1, 2013; Nov. 18, 2024
- Amended§ 393.122 Specific securement requirements for paper rolls.View diffChanged Nov. 18, 2024
- Amended§ 393.124 Specific securement requirements for concrete pipe.View diffChanged 2 times: Oct. 1, 2013; Nov. 18, 2024
- Amended§ 393.126 Specific securement requirements for intermodal containers.View diffChanged Nov. 18, 2024
- Amended§ 393.128 Specific securement requirements for automobiles, light trucks, and vans.View diffChanged Nov. 18, 2024
- Amended§ 393.130 Specific securement requirements for heavy vehicles, equipment, and machinery.View diffChanged Nov. 18, 2024
- Amended§ 393.132 Specific securement requirements for flattened or crushed vehicles.View diffChanged Nov. 18, 2024
- Amended§ 393.134 Specific securement requirements for roll-on/roll-off and hook lift containers.View diffChanged Nov. 18, 2024
- Amended§ 393.136 Specific securement requirements for large boulders.View diffChanged 2 times: Oct. 1, 2013; Nov. 18, 2024
- Amended§ 393.203 Cab and body components.View diffChanged 2 times: Oct. 1, 2013; Oct. 1, 2014
- Amended§ 393.209 Steering wheel systems.View diffChanged Jan. 1, 2017
Unchanged (48)
- § 393.9 Lamps operable, prohibition of obstructions of lamps and reflectors.
- § 393.13 Retroreflective sheeting and reflex reflectors, requirements for semitrailers and trailers manufactured before December 1, 1993.
- § 393.19 Hazard warning signals.
- § 393.20 [Reserved]
- § 393.22 Combination of lighting devices and reflectors.
- § 393.23 Power supply for lamps.
- § 393.24 Requirements for head lamps, auxiliary driving lamps and front fog lamps.
- § 393.25 Requirements for lamps other than head lamps.
- § 393.26 Requirements for reflectors.
- § 393.27 [Reserved]
- § 393.28 Wiring systems.
- § 393.29 [Reserved]
- § 393.30 Battery installation.
- § 393.31-393.33 [Reserved]
- § 393.40 Required brake systems.
- § 393.41 Parking brake system.
- § 393.43 Breakaway and emergency braking.
- § 393.44 Front brake lines, protection.
- § 393.46 [Reserved]
- § 393.48 Brakes to be operative.
- § 393.50 Reservoirs required.
- § 393.51 Warning signals, air pressure and vacuum gauges.
- § 393.55 Antilock brake systems.
- § 393.61 Truck and truck tractor window construction.
- § 393.62 Emergency exits for buses.
- § 393.63 [Reserved]
- § 393.68 Compressed natural gas fuel containers.
- § 393.69 Liquefied petroleum gas systems.
- § 393.70 Coupling devices and towing methods, except for driveaway-towaway operations.
- § 393.76 Sleeper berths.
- § 393.78 Windshield wiping and washing systems.
- § 393.79 Windshield defrosting and defogging systems.
- § 393.81 Horn.
- § 393.82 Speedometer.
- § 393.83 Exhaust systems.
- § 393.84 Floors.
- § 393.85 [Reserved]
- § 393.87 Warning flags on projecting loads.
- § 393.88 Television receivers.
- § 393.89 Buses, driveshaft protection.
- § 393.90 Buses, standee line or bar.
- § 393.91 Buses, aisle seats prohibited.
- § 393.92 [Reserved]
- § 393.93 Seats, seat belt assemblies, and seat belt assembly anchorages.
- § 393.94 Interior noise levels in power units.
- § 393.201 Frames.
- § 393.205 Wheels.
- § 393.207 Suspension systems.