1066 LAWS OF MARYLAND. [CH. 407

to be displayed, and twenty dollars ($20. 00) additional for
each additional ton of carrying capacity or fraction thereof,
the carrying capacity of such vehicles to be determined by the
Commissioner of Motor Vehicles in disputed cases. Where
the vehicle so trailed or propelled is equipped with two or
more metal tires, the charge shall be double those above speci-
fied. Said fees shall not be chargeable in the case of thresh-
ing outfits, clover huller, hay balers, binders and other sim-
ilar farming implements not designed for hauling purposes.

Class H. Twenty-five dollars ($25. 00) for each tractor
or traction engine, or any other similar vehicles used for pro-
pelling, supporting or drawing a trailer or semi-trailer. This
charge shall not apply to, nor shall registration tags be re-
quired to be displayed on a tractor or traction engine used
for hauling on an unimproved road or for drawing or pro-
pelling agricultural or farming implements so long as such
vehicle is not used for hauling purposes (except for drawing
or propelling agricultural or farming implements) upon any
improved highway.

The charges above prescribed for the markers and certifi-
cates of registration provided for in Classes A and F, shall
not apply to vehicles using the public highways of the State
and propelled by steam or electricity. For such vehicles, the
following fees shall be paid per annum to the Commissioner
of Motor Vehicles for the markers and certificates of regis-
tration issued by him in accordance with the provisions of
this sub-title.

Class I. Sixty cents ($. 60) per horse power or fraction
thereof in the case of all motor vehicles having pneumatic
tires, with a minimum charge of ten ($10. 00) dollars for any
motor vehicle.

Class J. Two dollars ($2. 00) per horse power or fraction
thereof in the case of all motor vehicles operating for the
purpose of transporting persons for hire upon any of the
public highways of this State, other than motor vehicles op-
erating on fixed schedules, the registration fees of which are
fixed by other specific provisions of law, and provided that
said charge shall be in lieu of all other taxes, fees or charges
of every kind upon said motor vehicle or upon the receipts
of those operating the same except the taxes imposed upon
the same as personal property.