778                                  LAWS OF MARYLAND                          [CH. 442

reserve or substitute motor vehicles are maintained by the applicant
to be used only in emergencies, and if so, the number of such
reserve and substitute motor vehicles and a complete description of
each (such motor vehicles when in use to be designated by a special
marker to be furnished by the Commissioner of Motor Vehicles);
(c) the length of the route in miles on state, state-aid, improved
county roads, and streets and roads of incorporated towns and cities
in the State of Maryland, respectively; (d) the weight of the vehicle
when empty; and (e) the schedule under which the vehicle shall be
operated. The application for registration of any such passenger
vehicle shall also state the seating capacity for passengers of said
vehicle; and the application for any such vehicle for the transporta-
tion of property or freight shall state the carrying capacity as given
by the manufacturer of such vehicle.

172. (Passenger vehicles, fees.)

(a)  for each passenger motor vehicle registered upon application
as provided by the preceding sections of this subtitle (except re-
serve or substitute vehicles and vehicles enumerated in subsection
(b) of this section), an anuual fee shall be paid to the Commis-
sioner of Motor Vehicles for certificates of registration issued by
him, of one-twentieth (1/20c) of a cent per each passenger seat
multiplied by the total number of miles that said application shall
show will be traveled by such motor vehicle over State, State-Aid,
improved County roads, and streets and roads of incorporated towns
and cities in the State of Maryland, during the year for which said
certificate is issued, and no other additional fees, licenses or tax
shall be charged by the State or any County or municipal sub-
division of the State except the property tax and gasoline tax in
respect to such vehicles or their operation.

(b)  A copy of the application filed with the Commissioner of Motor
Vehicles shall be forwarded to the State Roads Commission, which
shall thereupon compute the fee payable by each motor vehicle
owner for each motor vehicle for which application for registration
has been made.

(c)  Such computation shall be based upon the mileage to be tra-
versed by said motor vehicle upon all highways having a hard,
smooth surface, composed of gravel, shells, crushed stone, concrete,
paving blocks, asphalt, or other similar substances.

(d)  The State Roads Commission shall have authority, in dis-
puted cases, to determine which roads and streets upon which such
motor vehicles are to be operated should be included in the compu-
tation.

(e)   The State Roads Commission, after making such computa-
tion, shall forthwith certify the same to the Commissioner of Motor
Vehicles, whereupon the fee shown to be payable by said computa-
tion shall immediately be paid by such motor vehicle owner to the
Commissioner of Motor Vehicles.

(f)   The license fees prescribed by subsection (a) of this section
shall not be applicable to any motor vehicle operated exclusively
within the corporate limits of any municipality of this State or
within any territory under the jurisdiction of the Federal Govern-
ment, or to any motor vehicle when such vehicle is operated exclu-