Any corporation owning, possessing, holding or operating a toll bridge structure located partly but not wholly within one county of this state and any substantial part of which so situated in this state is used or operated, howsoever, by or in connection with any common carrier railroad, as an instrumentality or facility for the conduct by such common carrier railroad of interstate commerce or its interstate transportation business, shall be considered and the same is hereby declared and defined to be a public service corporation as to all of its property situated in this state and which is liable to taxation in this state; and such property shall be wholly and exclusively subject to valuation and assessment for the purposes of taxation by the state tax commission of Mississippi, which commission is by law constituted state assessor of railroads and other public service corporations. Such property of said corporation shall be assessed to the extent and in like manner as the property of other public service corporations and public utilities now subject to the authority and jurisdiction of said commission; and said toll bridge corporations shall make and file schedules in time and manner as provided by Sections 27-35-309, 27-35-317 and 27-35-323 and under penalties as therein provided.

Such property of all persons, partnerships or associations of persons, so owned, held, possessed, operated, situated and utilized, however, shall, likewise, be valued and assessed for the purposes of taxation by the said state tax commission of Mississippi.