Texas Civil Practice and Remedies Code - CIV PRAC & REM § 15.020. Major Transactions:  Specification of Venue by Agreement

(a) In this section, “major transaction” means a transaction evidenced by a written agreement under which a person pays or receives, or is obligated to pay or entitled to receive, consideration with an aggregate stated value equal to or greater than $1 million.  The term does not include a transaction entered into primarily for personal, family, or household purposes, or to settle a personal injury or wrongful death claim, without regard to the aggregate value.

(b) An action arising from a major transaction shall be brought in a county if the party against whom the action is brought has agreed in writing that a suit arising from the transaction may be brought in that county.

(c) Notwithstanding any other provision of this title, an action arising from a major transaction may not be brought in a county if:

(d) This section does not apply to an action if:

(e) This section does not affect venue and jurisdiction in an action arising from a transaction that is not a major transaction.