Tex. Finance Code § 203.001

(a) With the prior approval of the commissioner, a Texas state bank may establish and maintain a de novo branch or acquire a branch in a state other than Texas pursuant to Section 32.203.

(b) With the prior approval of the commissioner, a Texas state bank may establish, maintain, and operate one or more branches in another state pursuant to an interstate merger transaction in which the Texas state bank is the resulting bank. Not later than the date on which the required application for the interstate merger transaction is filed with the responsible federal bank supervisory agency, the applicant Texas state bank shall file an application on a form prescribed by the commissioner and pay the fee prescribed by law. The applicant shall also comply with the applicable provisions of Sections 32.301-32.303. The commissioner shall approve the interstate merger transaction and the operation of branches outside of this state by the Texas state bank if the commissioner makes the findings required by Section 32.302(b). An interstate merger transaction may be consummated only after the applicant has received the commissioner's written approval.