Oregon Revised Statutes Oregon Vehicle Code § 810.420

(1) When the speed of a vehicle has been checked by a speed measuring device, the driver of the vehicle may be stopped, detained and issued a citation by a police officer if the officer is in uniform and has either:

(2) A police officer may not issue a citation based on a speed measuring device unless the officer has taken and passed a training course, approved by the law enforcement agency that employs the officer, in the use of the speed measuring device.