In Minnesota we have a law commonly called the "implied consent law." It allows the government to administratively revoke a person's drivers license if a police officer claims to have arrested the person on probable cause DUI and then the person either refused a chemical test for alcohol or their sample was read at 0.08 or more within 2 hours of driving, operating, or controlling a motor vehicle. Later, the person might or might not get charged with a DUI crime but the "implied consent" license revocation will normally take effect soon after the refusal or over 0.08 chemical test; and will become permanent unless the driver files a court action to request a judge review it. This normally requires a lawyer's help. For more information about this check out my website and-or give me a phone call.