Texas Transportation Code - TRANSP § 724.011. Consent to Taking of Specimen

(a) If a person is arrested for an offense arising out of acts alleged to have been committed while the person was operating a motor vehicle in a public place, or a watercraft, while intoxicated, or an offense under Section 106.041, Alcoholic Beverage Code, the person is deemed to have consented, subject to this chapter, to submit to the taking of one or more specimens of the person's breath or blood for analysis to determine the alcohol concentration or the presence in the person's body of a controlled substance, drug, dangerous drug, or other substance.

(b) A person arrested for an offense described by Subsection (a) may consent to submit to the taking of any other type of specimen to determine the person's alcohol concentration.