Tex. Finance Code § 182.104

(a) With the prior written approval of the banking commissioner, a state trust company may at any time through action of its board, and without requiring action of its shareholders or participants, issue and sell its capital notes or debentures. The notes or debentures must be subordinate to the claims of depositors and may be subordinate to other claims, including the claims of other creditors or classes of creditors or the shareholders or participants.

(b) Capital notes or debentures may be convertible into shares or participation shares of any class or series. The issuance and sale of convertible capital notes or debentures are subject to satisfaction of preemptive rights, if any, to the extent provided by law.

(c) Without the prior written approval of the banking commissioner, a state trust company may not pay interest due or principal repayable on outstanding capital notes or debentures when the state trust company is in hazardous condition or insolvent, as determined by the banking commissioner, or to the extent that payment will cause the state trust company to be in hazardous condition or insolvent.

(d) The amount of any outstanding capital notes or debentures that meet the requirements of this section and that are subordinated to unsecured creditors of the state trust company may be included in equity capital of the state trust company for purposes of determining hazardous condition or insolvency, and for such other purposes provided by rules adopted under this subtitle.