Sec. 63.033.  TERM OF PERMIT AND REGISTRATION.  A permit or registration issued under this chapter is permanent unless:
(1)  the service revokes, suspends, annuls, or amends the permit or registration;
(2)  the permittee or registrant withdraws or cancels the permit or registration;  or
(3)  the service requires a new permit or new registration.
Acts 1981, 67th Leg., p. 1143, ch. 388, Sec. 1, eff. Sept. 1, 1981.  Amended by Acts 1983, 68th Leg., p. 1842, ch. 349, art. 1, Sec. 2, eff. Sept. 1, 1983.