Permits shall be furnished for sale in such form and manner as prescribed in sections 37-1101 to 37-1114 and shall be required to be permanently affixed to all motor vehicles entering designated permit areas except:
(1) Motor vehicles bearing state licenses;
(2) Motor vehicles in use for law enforcement or emergency purposes;
(3) Motor vehicles engaged in the servicing, enforcement, administration, repair, maintenance, or construction of facilities or property and motor vehicles engaged in the delivery of commodities or materials to the permit areas;
(4) Motor vehicles being operated on a federal, state, or county highway which crosses a permit area, entering at one point and exiting at another;
(5) Motor vehicles which are traveling directly between the permit boundary and the site within the area where permits are vended;
(6) Motor vehicles being operated by the holders of easements across permit areas or their agents, employees, or contractors; and
(7) Motor vehicles bearing dealer number plates which shall not be required to have a permit permanently affixed but which shall display such permit.