Tex. Ins. Code § 427.052
(a) An insurer or health maintenance organization may assume a subordinated liability for repayment of a loan or advance described by Section 427.051 and payment of interest on the loan or advance if the insurer or health maintenance organization and the creditor execute a written agreement stating that the creditor may be paid only out of that portion of the insurer's or health maintenance organization's surplus that exceeds the greater of:
Added by Acts 2005, 79th Leg., Ch. 727 (H.B. 2017), Sec. 1, eff. April 1, 2007.