Yes, unless you meet one of the 2 recognized exemptions. The Oregon DUII Diversion Agreement requires everyone who enters diversion to have an interlock on any car they drive, while they have driving privileges, for the entire diversion period.
There are 2 recognized exemptions. The first is the medical condition. You’d have to have a medical condition, and the documentation to prove it, that would prevent you from using an interlock device. To sum it up, you’d need a doctor to attest to what condition you had, whether it was permanent, and whether it prevented you from blowing more than 5 pounds of pressure for 5 seconds or resulted in a ketone level that causes you to fail the test. On DUII Diversion cases, the judge would have the final say.
The other exemption is the employee owned vehicle exemption. If driving an employee owned vehicle, DMV has a form you and your employer fill out, and you must keep it with you any time your operating an employer owned vehicle with out and IID.
Unless you meet one of these exemptions, you will have to get an IID. Now there is a new law that will potentially allow for the removal of the IID after 6 months, but that will be covered later.