Tex. Ins. Code § 424.059
An insurer may invest the insurer's funds in excess of minimum capital and surplus in a bond or other evidence of indebtedness of any state or of Canada or a province of Canada that:
(2) at the time of purchase:
Added by Acts 2005, 79th Leg., Ch. 727 (H.B. 2017), Sec. 1, eff. April 1, 2007.