LICENSES. 2007

the registration of motor vehicles or licensing of operators thereof, and
the display of identification or registration numbers on such vehicles, and
who shall cause the identification number of such State, in accordance with
the laws thereof and none other, together with the initial letter or letters
of said State to be displayed on his motor vehicle as in this sub-title pro-
vided, while used or operated upon the public highways of this State, may
use the highways of this State without obtaining a registration certificate
or operator's license from the Commissioner of Motor Vehicles as here-
inbefore prescribed; provided the State of which he is a resident and the
registration certificate which he displays shall extend the same privilege
to residents of this State; provided that if any non-resident be convicted
before any Justice of the Peace, committing Magistrate or Police Justice
of violating any provision of this sub-title, he shall thereafter be subject
to and required to comply with all the provisions of this sub-title relating
to the registration of motor vehicles and the licensing of operators thereof;
and the Governor of this State is hereby authorized and empowered to
confer and advise with the proper officers and legislative bodies of other
States of the Union, and enter into reciprocal agreements under which
the registration of motor vehicles owned by the residents of this State will
be recognized by such other States, and he is further authorized and
empowered from time to time to grant to residents of other States the
privilege of using the roads of this State as in this section provided in
return for similar privileges granted residents of this State by such other
States.

The aforegoing exemption of non-residents shall not apply to opera-
tors of motor vehicles or motor cycles who are residents of States which
do not require the display of identification markers on the same, nor shall
it apply to non-residents of this State for periods in excess of three months
in any year or to non-residents engaged as common carriers in the trans-
portation of passengers or freight wholly or partly in this State.

Any non-resident operating a motor vehicle in this State contrary to
the provisions of this section shall be deemed guilty of displaying a ficti-
tious marker, or operating without a license and subject to the penalties
prescribed elsewhere in this sub-title for such offenses in the case of
residents.

In absence of national legislation state may prescribe uniform regulations
necessary for public safety and order in respect to operation of motor vehicles upon
its highways—those moving in interstate commerce as well as others. The reason-
ableness of state's regulations are open to inquiry so far as they affect interstate
commerce, and in that regard it is subordinate to the will of congress. Regulations
and charges under sec. 143 of Code of 1912, (vol. 2), held reasonable; who may
not complain of law. Hendrick v. Maryland, 59 L. Ed. 386. (See also 115 Md. 552.)

1920, ch. 216.

191. The Commissioner of Motor Vehicles of the State of Maryland
is hereby authorized and directed with the advice and consent of the
Governor of Maryland, to enter into a reciprocal agreement with the
proper authorities of the District of Columbia for the issuance of a joint
license or identification tag for the State of Maryland and the District
of Columbia, to provide for the issuance of said license tags by both the