Tex. Tax Code § 151.251 — SECURITY REQUIRED

(a) An applicant for a sales tax permit or for registration as a retailer under Section 151.106 of this code must file with the comptroller adequate security for the payment of the taxes imposed by this chapter. (b) If the holder of a sales tax permit or a retailer registered under Section 151.106 of this code who is exempted under Section 151.254 of this code from filing security under this subchapter is determined by the comptroller to be delinquent in the payment of the taxes imposed by this chapter, the comptroller shall require the holder or retailer to file with the comptroller adequate security for the payment of the taxes imposed by this chapter. (c) For the purposes of Subsection (b) of this section, a holder of a permit or a retailer is delinquent in the payment of the taxes imposed by this chapter if the holder or retailer fails to file all reports due or to pay any determination before the day the determination could be paid without additional penalty. (d) If the comptroller determines that it is necessary to ensure compliance with this chapter, the comptroller may require security from a person as a condition to retaining a permit under this chapter. Acts 1981, 67th Leg., p. 1556, ch. 389, Sec. 1, eff. Jan. 1, 1982.