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HORN, UNLAWFUL USE OF
815.225 Violation of use limits on sound equipment; exemptions; penalty. (1) A person commits the offense of violation of use limits on sound equipment if the person does any of the following:
(a) Uses upon a vehicle, any bell, siren, compression or exhaust whistle.
(b) Uses a horn otherwise than as a reasonable warning or makes any unnecessary or unreasonably loud or harsh sound by means of a horn or other warning device.
(2) Authorized emergency vehicles and ambulances are not subject to this section but are subject to ORS 820.370 and 820.380.
(3) The offense described in this section, violation of use limits on sound equipment, is a Class C traffic violation.