Oregon Revised Statutes Oregon Vehicle Code § 807.137

(1) Notwithstanding ORS 807.130, a driver license held by a person described in subsection (2) of this section that expires while the holder is volunteering outside of the United States shall remain valid and grant driving privileges for 90 days after the date the person returns to the United States.

(2) Subsection (1) of this section applies to persons who are performing services in a location outside of the United States on a volunteer basis for a nonprofit religious, charitable or relief organization, whether or not such persons receive meals or lodging or reimbursements or vouchers for meals, lodging or expenses.

(3) The court shall dismiss the charge of operating a vehicle without driving privileges under ORS 807.010 if, when charged, a person described in subsection (2) of this section held a valid driver license pursuant to subsection (1) of this section.