Texas Natural Resources Code - NAT RES § 111.089. Discrimination as to Royalty Oil

(a) In making purchases of royalty oil, a common purchaser shall comply with the provisions of this subchapter, Subchapters C, F, and G of this chapter,  1 and Sections 111.004, 111.025, 111.131 through 111.133, 111.136, 111.137, and 111.140 of this code, and shall not discriminate between royalty owners or landowners or both in making those purchases.

(b) No common purchaser may unreasonably delay payments to a royalty owner or landowner or both in purchases of said oil or gas.

(c) In addition to other penalties, the royalty owner or landowner or both have a cause of action for violation of this section against the common purchaser for damages and may file suit for damages in any court of competent jurisdiction in the county in which the royalty lies.