The Implied Consent Law
In Texas, if a person is arrested for some type of legal offense that was done while the person was driving a motor vehicle, boat, or other watercraft and it appears the person was intoxicated then the person can be charged with a violation of the implied consent law. This law requires a person to provide a breath, blood, or urine test if law enforcement suspects that you were intoxicated and driving or boating. This requirement will generally come after the officer has asked you to perform a sobriety test. This is the infamous stand on one foot to check your balance or touch your finger to your nose for observation of your muscle control test. If you fail these test then a bodily fluid test of some sort will be required. The next piece of information to know about this situation is that the officer gets to choose which method it will be, blood, breath, or urine for illegal substances. So, arguing with law enforcement at that time will definitely turn into more trouble for you.
Again, we get back to the argument of why do this to yourself? The implied consent law becomes even harsher in regards to minors because if the minor has any detectable amount of alcohol in their system while operating a motor vehicle in a public place, the person is deemed to have consented 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. Refusal to provide a specimen can result in the suspension of your driving privilege and any driver's license. The suspension for a minor who refuses is 180 days for the first refusal, and 2 years for subsequent refusals. A minor who gives a specimen which confirms that he or she has been operating a motor vehicle or watercraft in a public place with any detectable amount of alcohol in their system (but which is below the 0.08% B.A.C. legal limit of intoxication in the state of Texas) will be charged with a Driving Under the Influence. This charge will result in their drivers license being suspended (or driving privilege will be denied if unlicensed) for 60 days for the first offense, 120 days for the second offense, and 180 days for the third and subsequent offense. The minor may request a hearing before an administrative Law Judge to contest the suspension.