Section 151.420 - Revocation of Direct Payment Permit(a) A person to whom a direct payment permit has been issued holds the permit as a matter of revocable privilege and not as a matter of right. The comptroller on his own initiative may cancel a direct payment permit, and the cancellation is not appealable.(b) A person whose direct payment permit is canceled by the comptroller is entitled to written notice of the cancellation, which shall be sent by the comptroller by registered mail. Acts 1981, 67th Leg., p. 1574, ch. 389, Sec. 1, eff. Jan. 1, 1982.