1514 Laws of Maryland Ch. 534
(c) No person shall use upon any motor vehicle, trailer, semi-
trailer, or pole trailer any lamp or reflector which tends to change
the original design or performance, unless the lamp or reflector is of
a type which has been approved by the commissioner, and is
mounted, adjusted, and aimed in accordance with rules and regula-
tions prescribed by the commissioner.
§ 12-231. Omitted.
§ 12-232. Revocation of certificate of approval on lighting devices.
(a) When the commissioner has reason to believe that an ap-
proved device as being sold commercially does not comply with the
requirements of this subtitle, after giving 30 days' previous notice to
the person holding the certificate of approval for such device in this
State, he may conduct a hearing upon the question of compliance of
the approved device. After the hearing the commissioner shall deter-
mine whether the approved device meets the requirements of this
subtitle. If the device does not meet the requirements of this sub-
title he shall give notice to the person holding the certificate of
approval for the device in this State.
(b) If at the expiration of 90 days after the notice the person
holding the certificate of approval for the device has failed to satisfy
the commissioner that the approved device as thereafter to be sold
meets the requirements of this subtitle, the commissioner shall sus-
pend or revoke the approval issued therefor until or unless the
device is resubmitted to and, retested by an authorized testing
agency and is found to meet the requirements of this subtitle, and
may require that all the devices sold since the notification following
the hearing be replaced with devices that do comply with the require-
ments of this subtitle. The commissioner may at the time of the
retest purchase in the open market and submit to the testing agency
one or more sets of the approved devices, and if the device upon
such retest fails to meet the requirements of this subtitle, the com-
missioner may refuse to renew the certificate of approval of the
device.
Part III—Brakes
§ 12-301. Brake equipment required.
(a) Every motor vehicle, trailer, semitrailer, and pole trailer,
and any combination of such vehicles, operating upon a highway
within this State shall be equipped with brakes in compliance with
the requirements of this subtitle. All the vehicles and combinations
of vehicles shall be equipped with service brakes complying with the
performance requirements of section 12-302 and adequate to control
the movement of and to stop and hold the vehicle under all condi-
tions of loading, and on any grade incident to its operation.
(b) Parking brakes-adequacy—All the vehicles and combinations
of vehicles, except motorcycles, shall be equipped with parking
brakes adequate to hold the vehicle on any grade on which it is
operated, under all conditions of loading, on a surface free from snow,
ice, or loose material. The parking brakes shall be capable of being
applied in conformance with the foregoing requirements by the
driver's muscular effort or by spring action or by equivalent means.
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