According to a story in DieselNet, the Euro VI levels are "aligned with US 2010 emission standards" and will only affect new type approvals in April 2013. All models will be affected in October 2014. There's more at Wikipedia.
This page is for personal, non-commercial use. You may order presentation ready copies to distribute to your colleagues, customers, or clients, by visiting http://www.autobloglicensing.com