Tex. Transp. Code § 724.062

The fact that a person's request to have an additional analysis under Section 724.019 is refused by the officer or another person acting for or on behalf of the state, that the person was not provided a reasonable opportunity to contact a person specified by Section 724.019(a) to take the specimen, or that reasonable access was not allowed to the arrested person may be introduced into evidence at the person's trial.