FAILURE TO SEND NOTICE OF SUBSTITUTION; DEFECTIVE NOTICE.
Tex. FIN Code § 274.105.
in effect(a) If the parties to a substitution agreement under Section 274.101 intentionally fail to send the required notice under Section 274.103 , the substitution of the fiduciary is ineffective.
(b) If the parties unintentionally fail to send the required notice, the substitution of the fiduciary is not impaired.
(c) If a substitution of a fiduciary is ineffective because of a defect in the required notice, any action taken by a subsidiary trust company before the substitution is determined to be ineffective is valid if the action would have been valid if performed by the affiliated bank.