Any municipality or county or political subdivision desiring to come under this article, whether such municipality be a special charter municipality or not, may so do and may own, operate, and maintain such toll bridge wholly within the State of Mississippi or partly within the State of Mississippi and partly within any adjoining state, together with all approaches to and from said bridge. This article shall apply to special charter cities simply by resolution of the governing authority thereof, either through resolution or ordinance, and without amendment to the charter of such municipality.