S.B. No. 535 amends the Code of Criminal Procedure by adding Article 38.372, which addresses the admissibility of evidence regarding a victim's past sexual behavior in prosecutions for specific offenses, including trafficking, sexual assault, and related crimes. The bill stipulates that reputation or opinion evidence of a victim's past sexual behavior is not admissible, and evidence of specific instances of such behavior is also generally inadmissible unless certain conditions are met. These conditions include an in-camera examination by the court to determine if the probative value of the evidence outweighs the potential for unfair prejudice to the victim.

Additionally, the bill disapproves Rule 412 of the Texas Rules of Evidence, which previously governed the admissibility of such evidence. The changes made by this Act will apply to criminal proceedings that commence on or after its effective date of September 1, 2025, while proceedings that begin before this date will continue to be governed by the law in effect at that time.