All motor vehicles owned or leased by any political subdivision of the state of Kansas shall bear the name of the political subdivision owning or leasing such vehicle plainly printed on both sides thereof. This act shall not apply to the following:
(a) Municipal fire apparatus, police patrols and ambulances;
(b) passenger vehicles used by plain clothes police officers, county or district attorney investigators or community corrections personnel working in the employ of any political subdivision; and
(c) motor vehicles owned or leased by any municipal university.