Calibration of measurement equipment to PN10 measures more particles than calibration to PN23. It is therefore logical that compliance with a limit when measured according to PN10 demonstrates compliance with the same limit according to PN23 but this text should be added for legal certainty.
The Motorcycle Industry in Europe (ACEM) represents the interests of 14 manufacturers of powered two wheelers (PTWs) and 18 national associations across 15 European countries.
You can find more information about ACEM at their website.