Tex. Gov't Code § 508.221

A parole panel may impose as a condition of parole or mandatory supervision any condition that a court may impose on a defendant placed on community supervision under Chapter 42A, Code of Criminal Procedure, including the condition that a releasee submit to testing for controlled substances or submit to electronic monitoring if the parole panel determines that without testing for controlled substances or participation in an electronic monitoring program the inmate would not be released on parole.