Even a first-time offender will have an IID for at least one year if they wish to reinstate their driver’s license. The requirements for the IID fall under Washington State RCWs Title 46, Chapter 46.20 Section 720. These durations are mandatory and heavily enforced. Regardless if your BAC was under or over the 0.15 cut off, you are likely to have an IID for one year. If you are a second-time offender, you will have an IID for up to five years, and a third or subsequent Spokane DUI will result in up to 10 years of an IID.