Tex. Fin. Code § 204.005

A foreign bank licensed to establish and maintain a Texas state branch or agency pursuant to Subchapter B, or which has registered a Texas representative office pursuant to Subchapter C, shall file with the commissioner a notice of change of control, in the form and containing the information the commissioner requires, not later than the 14th day after the date of a merger or other transaction that results or will result in a change of control.