LICENSES. 177

the rear of such motor vehicle, the one on the rear to be fas-
tened so as not to swing. Every motorcycle, while being used
or operated in this State, shall- have displayed on the rear
thereof the plate or marker furnished by the Commissioner of
Motor Vehicles as aforesaid, said plate or marker to be so fas-
tened as to be entirely unobscured and to be kept reasonably
clean. No motor vehicle while used or operated in this State
shall have displayed upon either the front or rear of such
vehicle more than two plates or markers; nor shall any person
display or permit to be displayed upon any motor vehicle oper-
ated by him the registration number belonging to another
vehicle, or a fictitious number plate or marker; provided, how-
ever, that in the event of the sale of a motor vehicle, the person
using the same may for a period of five days, and no longer,
operate such motor vehicle under the number assigned to it as
aforesaid, provided he have and display on demand of any
proper officer the actual consent in writing of such previous
owner to use such number; and provided, also, that where
it clearly appears that the registration number has been lost
by accident, no penalty shall be imposed.

NON-RESIDENT OWNERS AND OPERATORS.

140a. Any owner or operator not a resident of this State
who shall have complied with the laws of the State in which he
resides, requiring the registration of motor vehicles or.licens-
ing of operators thereof and the display of identification or
registration numbers on such vehicles, and who shall cause the
identification numbers of such State, in accordance with the
laws thereof, and none other, together with the initial letter of
said State, to be displayed on his motor vehicle, as in this sub-
title provided, while used or operated upon the public high-
ways of this State, may use such highways not exceeding two
periods of seven consecutive days in each calendar year, with-
out complying with the provisions of Sections 133 and 137 of
this subtitle; if he obtains from the Commissioner of Motor
Vehicles and displays on the rear of such vehicle a tag or
marker which the said Commissioner of Motor Vehicles shall
issue in such form and contain such distinguishing marks as he
may deem best; provided, that if any non-resident be convicted
of violating any provisions of Sections 140b, 140c, 140d, 140e
and 1401 of this subtitle, he shall thereafter be subject to and
required to comply with all the provisions of said Sections
133 and 137 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 residents of this