IMPLIED CONSENT THE IMPLIED CONSENT LAW ALLOWS: Law enforcement officers to require a sample of your breath for alcohol testing after a lawful  arrest for Driving Under the Influence (DUI).  Law enforcement officers to require a sample of your blood or urine for alcohol or con-  trolled substance testing if you are involved in a crash that causes death or serious physical  injury to another person.  Depending on your number of prior DUI offenses, refusal to submit to chemical testing after  lawful arrest can be a criminal misdemeanor or felony. Refusal to submit to chemical testing  will result in two criminal charges – DUI and Refusal – which the court can treat separately.  During a revocation period, there is no limited “work purpose” driving privileges for a person  who refuses to submit to chemical testing.  Another aspect of the implied consent law allows a law enforcement officer to administer a  preliminary breath test at the scene of an incident. If you have been in a crash or commit-  ted a moving violation and the law enforcement officer has probable cause to believe that  your ability to operate a motor vehicle is impaired by alcohol, the officer can require you to  provide a sample of your breath on a portable (preliminary) breath testing instrument.  Refusal to submit to preliminary breath testing is an infraction.  When you operate or drive a motor vehicle in the State of Alaska, you are consenting to a  chemical test of your breath for the purpose of determining the alcohol concentration of your  blood or breath. This is known as implied consent. 