Art. 18B.153.  ADMISSIBILITY OF EVIDENCE OBTAINED.  The state may not use as evidence in a criminal proceeding any information gained through the use of a pen register or trap and trace device installed under this subchapter if an authorized peace officer:
(1)  does not apply for authorization for the pen register or trap and trace device; or
(2)  applies for but does not obtain that authorization.  
Added by Acts 2017, 85th Leg., R.S., Ch. 1058 (H.B. 2931), Sec. 1.02, eff. January 1, 2019.