(a) A permit is valid for one year.
(b) A permit automatically expires on the date that the license under which the permit was issued expires or is revoked by the department under §21.158 of this subchapter (relating to License Revocation).

Source Note: The provisions of this §21.171 adopted to be effective July 1, 2011, 36 TexReg 2418; amended to be effective March 14, 2018, 43 TexReg 1446