Tex. Natural Resources Code § 111.002

A person is a common carrier subject to the provisions of this chapter if it:

(1) owns, operates, or manages a pipeline or any part of a pipeline in the State of Texas for the transportation of crude petroleum to or for the public for hire, or engages in the business of transporting crude petroleum by pipeline;

(2) owns, operates, or manages a pipeline or any part of a pipeline in the State of Texas for the transportation of crude petroleum to or for the public for hire and the pipeline is constructed or maintained on, over, or under a public road or highway, or is an entity in favor of whom the right of eminent domain exists;

(3) owns, operates, or manages a pipeline or any part of a pipeline in the State of Texas for the transportation of crude petroleum to or for the public for hire which is or may be constructed, operated, or maintained across, on, along, over, or under the right-of-way of a railroad, corporation, or other common carrier required by law to transport crude petroleum as a common carrier;

(4) under lease, contract of purchase, agreement to buy or sell, or other agreement or arrangement of any kind, owns, operates, manages, or participates in ownership, operation, or management of a pipeline or part of a pipeline in the State of Texas for the transportation of crude petroleum, bought of others, from an oil field or place of production within this state to any distributing, refining, or marketing center or reshipping point within this state;

(5) owns, operates, or manages, wholly or partially, pipelines for the transportation for hire of coal in whatever form or of any mixture of substances including coal in whatever form;

(6) owns, operates, or manages, wholly or partially, pipelines for the transportation of carbon dioxide or hydrogen in whatever form to or for the public for hire, but only if such person files with the commission a written acceptance of the provisions of this chapter expressly agreeing that, in consideration of the rights acquired, it becomes a common carrier subject to the duties and obligations conferred or imposed by this chapter; or

(7) owns, operates, or manages a pipeline or any part of a pipeline in the State of Texas for the transportation of feedstock for carbon gasification, the products of carbon gasification, or the derivative products of carbon gasification, in whatever form, to or for the public for hire, but only if the person files with the commission a written acceptance of the provisions of this chapter expressly agreeing that, in consideration of the rights acquired, it becomes a common carrier subject to the duties and obligations conferred or imposed by this chapter.