Tex. Gov't Code § 552.124
(a) A record of a library or library system, supported in whole or in part by public funds, that identifies or serves to identify a person who requested, obtained, or used a library material or service is excepted from the requirements of Section 552.021 unless the record is disclosed:
(3) to a law enforcement agency or a prosecutor under a court order or subpoena obtained after a showing to a district court that:
Added by Acts 1995, 74th Leg., ch. 76, Sec. 5.03(a), eff. Sept. 1, 1995;
Acts 1995, 74th Leg., ch. 1035, Sec. 11, eff. Sept. 1, 1995.
Acts 2011, 82nd Leg., R.S., Ch. 1229 (S.B. 602), Sec. 16, eff. September 1, 2011.