Texas Penal Code - PENAL § 1.03. Effect of Code

(a) Conduct does not constitute an offense unless it is defined as an offense by statute, municipal ordinance, order of a county commissioners court, or rule authorized by and lawfully adopted under a statute.

(b) The provisions of Titles 1, 2, and 3  1 apply to offenses defined by other laws, unless the statute defining the offense provides otherwise; however, the punishment affixed to an offense defined outside this code shall be applicable unless the punishment is classified in accordance with this code.

(c) This code does not bar, suspend, or otherwise affect a right or liability to damages, penalty, forfeiture, or other remedy authorized by law to be recovered or enforced in a civil suit for conduct this code defines as an offense, and the civil injury is not merged in the offense.