The definition of DUI remains the same regardless of the location you are arrested at: Portland, Eugene and Salem, among others. Officers can suspect that you are driving under influence and administer a breathalyzer test at the scene. This device tests BAC based on the alcohol content in your breath. The police officers will test BAC and if it is .08 or higher, you will be charged with committing DUI per se.
A person, typically a lawyer, appointed to act for another in business or legal matters.