In 1995, Federal Rule of Evidence 413 became law. It states that "[in] a criminal prosecution in which a defendant is accused of a sexual assault, the court may admit evidence that the defendant committed any other sexual assault [and] [t]he evidence may be considered on any matter to which it is relevant." Thus, Rule 413 allows evidence of an uncharged sexual assault to show a defendant's propensity to commit sexual assault. It is an exception to the general ban on propensity evidence set forth in Rule 404(b).