Here is a link to the most recent available manual provided to DMV judges reviewing Oregon’s process for suspending driving privileges of impaired drivers under the Implied Consent law. The manual begins with an historical overview of the Implied Consent concept, moves into a discussion of the process involved in police investigation and arrest of an intoxicated driver for DUII, and the remainder of the outline covers those subjects as they actually arise in the course of Implied Consent hearings: Guide to Implied Consent Hearings