Texas Insurance Code - INS § 481.001. Deposit with Comptroller

(a) An insurer organized and engaged in business under this code that is required by another state, country, or province as a condition of engaging in an insurance business in that state, country, or province to make or maintain a deposit with an officer of any state, country, or province may, at the insurer's discretion, voluntarily deposit with the comptroller cash or securities in an amount that is sufficient to satisfy the conditions of the other state, country, or province.

(b) Any securities deposited must be approved by the commissioner as being of a type and character in which the insurer is authorized by law to invest.