The European Commission is revising the current emission limits for motor vehicles (the Euro 4 standards, which have applied since 1/01/2005), including ozone precursors such as nitrogen oxides and hydrocarbons as well as particles emitted by diesel engines. The new standards (known as Euro 5) will apply from 1/09/2009. The new legislation also requires information on vehicle repairs to be easily available to independent repairers.