ORS 190.472

A full-time, fully compensated police officer commissioned by the State of Washington, Idaho or California or any full-time, fully compensated police officer commissioned by a unit of local government of the State of Washington, Idaho or California may exercise any authority that the officer’s commission vests in the officer throughout the territorial bounds of Oregon if the officer is acting pursuant to a mutual law enforcement assistance agreement between a law enforcement agency of the neighboring state and a law enforcement agency of Oregon.