Sec. 822.031.  UNREGISTERED DOGS PROHIBITED FROM RUNNING AT LARGE.  The owner or person having control of a dog at least six months of age in a county adopting this subchapter may not allow the dog to run at large unless the dog:
(1)  is registered under this subchapter with the county in which the dog runs at large;  and
(2)  has fastened about its neck a dog identification tag issued by the county.
Acts 1989, 71st Leg., ch. 678, Sec. 1, eff. Sept. 1, 1989.