Portable Breath Test (PBT) Laws

  
October 8, 2012
By James E. Novak, P.L.L.C. on October 8, 2012 4:44 PM |

DUI lawyer Chandler AZ.jpg5 reasons police conduct Preliminary Breath Tests

Arizona is one of a majority of states with Preliminary Breath Test (PBT) Laws.

The PBT is a small mobile device used to establish the presence of alcohol in a person's system. The PBT is intended to be used as an early detection or screening tool by police. Arizona does not allow a PBT to be admitted as evidence in court against a person accused of DUI, because the machines historically are not considered accurate in measuring exact Blood Alcohol Content (BAC) Levels. In addition, PBT units are not calibrated or routinely maintained like the official Breath Tests Machines.

Arizona Portable Breath Test (PBT) Law

Under A.R.S. 28 § 1322 Preliminary Breath Test law a police officer who has reasonable suspicion to believe a person is driving under the influence of drugs or alcohol has authority to request that a person submit to a preliminary breath test.

Under this law, the officer may also require the person to submit to further testing
pursuant to the Implied Consent Law A.R.S. 28 § 1321. This includes DUI blood, breath, urine testing.

5 reasons PBTs are commonly used in Arizona

The National Highway Safety Administration recognizes that although the PBT is useful, it is not admissible as sole evidence to determine BAC; but is generally reliable in determining if any alcohol at all is present in a person's system. Arizona courts do consider PBT evidence to be admissible in court as evidence against a defendant facing DUI charges. Below the police may likely choose a PBT in a DUI field investigation:

• To determine or rule out DUI influence of alcohol v. drugs;
• Drivers who may have a high alcohol tolerance level, and can perform field sobriety tests or other tasks to a greater degree than those with lower tolerance levels;
• To detect if an underage 21 person is under the influence of any alcohol in violation of the state's Zero Tolerance law;
• As a preliminary DUI screening test only; and if positive, will be followed up with an Official Breath Test Machine.
• At the scene of a DUI collision where the driver is suspected of DUI, but has been injured and is unable to perform Standard Field Sobriety Tests (FSTs).

Criminal Defense for DUI Chandler AZ

Arizona laws and penalties are some of the toughest in the country. If you have been arrested for any type of DUI you should always consult a qualified criminal attorney to discuss your charges. You should do this before you appear in court or plead guilty to the charges. You have the constitutional right to defend your charges, and this is done by pleading not guilty and retaining proper legal representation. There may be defenses that you are not aware of that if used, may lead to a dismissal of charges, sentencing, or other favorable outcome in your case.


Additional Resources:


Arizona State Legislature - Portable Breath Test Laws A.R.S. 28 § 1322

Arizona State Legislature - Implied Consent Laws A.R.S. 28 § 1321

Arizona Department of State - Public Safety - Determining Alcohol Concentration

Arizona Governor's Office of Highway Safety - DUI laws


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