Section 21.420 - Permit Expiration(a) A permit is valid for one year.(b) A permit automatically expires on the date that the license issued under which the permit was issued expires or is revoked by the department under § 21.158 of this chapter (relating to License Revocation) or § 21.455 of this subchapter (relating to License Revocation and Non-Renewal).43 Tex. Admin. Code § 21.420
The provisions of this §21.420 adopted to be effective July 1, 2011, 36 TexReg 2418; amended to be effective April 19, 2012, 37 TexReg 2687