Texas constitution
Article 16: general provisions
Section 25

That all drawbacks and rebatement of insurance, freight, transportation, carriage, wharfage, storage, compressing, baling, repairing, or for any other kind of labor or service of, or to any cotton, grain, or any other produce or article of commerce in this State, paid or allowed or contracted for, to any common carrier, shipper, merchant, commission merchant, factor, agent, or middleman of any kind, not the true and absolute owner thereof, are forever prohibited, and it shall be the duty of the Legislature to pass effective laws punishing all persons in this State who pay, receive or contract for, or respecting the same.