20                                     LAWS OF MARYLAND                            [CH. 16

of registration, the official or agency of a state administering the
proration of registration in that state.

(d)  Person. Person shall include any individual, firm, co-part-
nership, joint venture, association, corporation, estate, trust, busi-
ness trust, receiver, syndicate, or any other group or combination
acting as a unit.

(e)  Base State. Base state shall mean the state from or in which
the bus is most frequently dispatched, garaged, serviced, maintained,
operated, or otherwise controlled, or also in the case of a fleet bus
the state to which it is allocated for registration under statutory
requirements. In order that this section may not be used for the
purpose of evasion of registration fees, the administrators of the
contracting states may make the final decision as to the proper base
state, in accordance with Article HI (h) hereof, to prevent or avoid
such evasion.

(f)  Bus. Bus shall mean any motor vehicle of a bus type engaged
in the interstate transportation of passengers and subject to the
jurisdiction of the Interstate Commerce Commission, or any agency
successor thereto, or one or more state regulatory agencies concerned
with the regulation of passenger transport.

(g)  Fleet. As to each contracting state, fleet shall include only
those buses which actually travel a portion of their total miles in
such state. A fleet must include three (3) or more buses.

(h) Registration. Registration shall mean the registration of a
bus and the payment of annual fees and taxes as set forth in or pur-
suant to the laws of the respective contracting states.

(i) Proration of Registration. Proration of registration shall
mean registration of fleets of buses in accordance with Article IV
of this agreement.

(j) Reciprocity. Reciprocity shall mean that each contracting
state, to the extent provided in this agreement, exempts a bus from
registration and registration fees.

398.

Article HI. General Provisions

(a)  Effect on Other Agreements, Arrangements, and Understand-
ings. On and after its effective date, this agreement shall supersede
any reciprocal or other agreement, arrangement, or understanding
between any two or more of the contracting states covering, in whole
or in part, any of the matters covered by this agreement; but this
agreement shall not affect any reciprocal or other agreement, ar-
rangement, or understanding between a contracting state and a
state or states not a party to this agreement.

(b)  Applicability to Exempt Vehicles. This agreement shall not
require registration in a contracting state of any vehicles which are
in whole or part exempt from registration under the laws or regu-
lations of such state without respect to this agreement.

(c)  Inapplicability to Caravaned Vehicle. The benefits and privi-
leges of this agreement shall not be extended to a vehicle operated
on its own wheels, or in tow of a motor vehicle, transported for the
purpose of selling or offering the same for sale to or by any agent,
dealer, purchaser, or prospective purchaser.