(1) This section establishes exemptions from ORS 815.140 and 815.142.
(2) The following are completely or partially exempt as described:
(a) Police vehicles under any conditions.
(b) Fire vehicles when responding to a fire.
(c) An ambulance when responding to an emergency.
(3) A passenger vehicle or truck is not required to use chains if the vehicle or truck:
(a) Has an unloaded weight of 6,500 pounds or less;
(b) Is equipped and operated to provide power to both front and rear wheels;
(c) Is carrying chains as defined in ORS 815.045;
(d) Is equipped with tires, on all wheels, that are vehicle traction tires as defined in ORS 815.045;
(e) Is not towing another vehicle other than as may be necessary to remove disabled vehicles from the roadway; and
(f) Is not being operated in a manner or under conditions where the vehicle loses traction while stopping, cornering or moving.