ROBERT L. EHRLICH, JR., Governor                             Ch. 355

(3)     Any vehicle being towed in driveaway or towaway operations,
provided that the combination of vehicles is capable of complying with the
performance requirements of § 22-302 of this subtitle;

(4)     Trucks, truck tractors, and special mobile equipment manufactured
before July 24, 1980 with three or more axles need not have brakes on the front
wheels. However, the trucks and truck tractors must be capable of complying with the
performance requirements of § 22-302 of this subtitle;

(5)     The wheel of a sidecar attached to a motorcycle or to a motor-driven
cycle, or the front wheel of a motor-driven cycle need not be equipped with brakes,
provided that the motorcycle or motor-driven cycle is capable of complying with the
performance requirements of § 22-302 of this subtitle; and

(6)     Any vehicle equipped with at least 2 steerable axles need not have
brakes on the wheels of 1 of the axles. However, the vehicle must be capable of
complying with the performance requirements of § 22-302 of this subtitle.

(e)     (1) Every trailer, semitrailer, and pole trailer equipped with air or
vacuum actuated brakes, and every trailer, semitrailer, and pole trailer with a
registered gross weight in excess of 10,000 pounds, manufactured or assembled after
June 1, 1970, shall be equipped with brakes acting on all wheels and of a character to
be applied automatically and promptly, and remain applied for at least 15 minutes on
breakaway from the towing vehicle.

(2) Every trailer, semitrailer, and pole trailer with a registered gross
weight of more than 3,000 pounds and not more than 10,000 pounds, manufactured or
assembled after June 1,1970, shall be equipped with brakes acting on all wheels of at
least 1 axle and of a character to be applied automatically and promptly, and remain
applied for at least 15 minutes on breakaway from the towing vehicle.

(f)      Every motor vehicle manufactured or assembled after June 1, 1970, and
used to tow a trailer, semitrailer, or pole trailer equipped with brakes, shall be
equipped with means for providing that, in case of breakaway of the towed vehicle,
the towing vehicle will be capable of being stopped by the use of its service brakes.

(g)     Air brake systems installed on trailers manufactured or assembled after
June 1, 1970, shall be so designed that the supply reservoir used to provide air for the
brakes is safeguarded against backflow of air from the reservoir through the supply
line.

(h) (1) Air Brakes. After June 1, 1971, every towing vehicle, when used to
tow another vehicle equipped with air controlled brakes, in other than driveaway or
towaway operations, shall be equipped with two means for emergency application of
the trailer brakes. One of these means shall apply the brakes automatically in the
event of a reduction of the towing vehicle air supply to a fixed pressure, which shall be
not lower than 20 pounds per square inch nor higher than 45 pounds per square inch.
The other means shall be a manually controlled device for applying and releasing the
brakes, readily operable by a person seated in the driving seat, and its emergency
position or method of operation shall be clearly indicated. In no instance may the

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