Texas Code of Criminal Procedure - CRIM P Art. § 46C.103. Competency to Stand Trial: Concurrent Appointment

(a) An expert appointed under this subchapter to examine the defendant with regard to the insanity defense also may be appointed by the court to examine the defendant with regard to the defendant's competency to stand trial under Chapter 46B, if the expert files with the court separate written reports concerning the defendant's competency to stand trial and the insanity defense.

(b) Notwithstanding Subsection (a), an expert may not examine the defendant for purposes of determining the defendant's sanity and may not file a report regarding the defendant's sanity if in the opinion of the expert the defendant is incompetent to proceed.