Tex. Finance Code § 32.401

(a) A state bank may purchase assets from another financial institution or other seller, except that the prior written approval of the banking commissioner is required if the purchase price exceeds an amount equal to three times the bank's unimpaired capital and surplus. The finance commission by rule may require a state bank to obtain the prior written approval of the banking commissioner for a transaction not otherwise subject to approval that involves potentially substantial risks to the safety and soundness of the purchasing bank.

(b) Except as otherwise expressly provided by another statute, the purchase of all or part of the assets of the selling entity does not make the purchasing bank responsible for any liability or obligation of the selling entity that the purchasing bank does not expressly assume.