Ar hyn o bryd, ledled yr UE, caiff oddeutu 40% o baledi pren eu trin i'r safon hwn. Mewn sefyllfa Brexit, ble y caiff y DU ei thrin fel trydydd gwlad, mae'n bosibl y bydd yn  rhaid i bob deunydd pacio pren sy'n symud rhwng y DU a'r UE gydymffurfio â ISPM15. Gallai hyn olygu y bydd tarfu ar fasnach oherwydd mwy o reolau WPM yn achosi oedi a WPM sydd ddim yn cydymffurfio yn cael ei gosbi.
Presently, throughout the EU, approximately 40% of wooden pallets are treated to this standard. In a Brexit scenario, where the UK is treated as a third country, all wood packaging moving between the UK and the EU may need to be ISPM15 compliant. This could mean a disruption to trade due to both increased WPM controls causing delays and non-compliant WPM being sanctioned.