If the previous paragraph mentioned preliminary investigation test results fail to meet the emissions standards, or the central competent authority determines that there are concerns on the test vehicle which may fail to comply with the emissions standards, then the central competent authority shall perform the confirmation investigation test on that engine family or vehicle model.The number of vehicles for the confirmation investigation test mentioned above shall be ten. For the confirmation investigation test results, if the arithmetic mean of the testing results for any regulated air pollutant exceeds the emissions standards limit, then the confirmation investigation test for that engine family or vehicle model shall be deemed as fail to comply with the emissions standards. However, for vehicles that applicable to article 5 of the emission standards effective on September 1, 2019, the determination of the confirmation investigation test results shall be in accordance with provisions stipulated in Appendix 1.If the vehicle manufacturer or importer has any objection against the confirmation investigation test results shall submit a written explanation document within twenty days after receipt of the notification from the central competent authority and the central competent authority shall hold the review meeting for this document.Appendix 1.pdf