Gasoline
From April 1, 2020, heavy-duty gasoline vehicles with a reference mass of more than 3.5 tonnes must meet Euro IV emission standards.
According to the published by the vehicle type approval (VTA) system under the Department of Environment, vehicles that can be fueled with gasoline, liquified petroleum gas (LPG), or natural gas, the maximum limit of CO must not exceed 3.5% at the setting specified by the manufacturer and must not exceed 4.5% within the range of adjustment specified in Annex 5 of the UN R83.05.