ORS 820.380: Illegal ambulance or emergency vehicle sirens; exemption; penalty.

(1) A person commits the offense of illegal ambulance or emergency vehicle sirens if the person drives or moves on any highway or owns and causes or knowingly permits to be driven or moved on any highway an ambulance or emergency vehicle that does not contain and is not at all times equipped with sirens or other audible signals in proper conditions and adjustment as required under ORS 820.370.

      (2) This section does not apply to any ambulance or person operating or owning an ambulance if the ambulance or person is exempted by ORS 682.035 or 682.079 from regulation by the Oregon Health Authority.

      (3) Authority of political subdivisions to regulate sirens and other audible signals is limited under ORS 682.031.

      (4) The offense described under this section, illegal ambulance or emergency vehicle sirens, is a Class C traffic violation.