Authorisation for the LEZ: vehicle used for emergencies Breadcrumb of search result Home Mobility in Ghent Low-emission zone in Ghent Authorisation for the LEZ: diesel vehicle euro 4 emissions standard Authorisation for the LEZ: vehicle used for emergencies Diesel vehicles used for emergencies with Euro 4 or 3 standard can enter the low-emission zone with a temporary permit. Read more about Authorisation for the LEZ: vehicle used for emergencies