3. The measurement of sound emissions produced by a motorcycle’s or moped’s exhaust system is carried out while the vehicle is stationary and the engine is running, at its operating temperature, by first applying the method where the engine runs at a constant speed.
If it is impossible to maintain the rotational speed of the engine as indicated in paragraph 4 of section 4, the measurement is carried out by applying the method where the engine runs at a variable speed.
If it is impossible to increase the rotational speed of the engine as indicated in paragraph 5 of section 4, the measurement is carried out by applying the method where the engine is idling.
588-2019O.C. 588-2019, s. 3.