The transition to WLTP will happen in phases:
- WLTP will officially apply to new types of cars from September 2017. New types of cars are vehicle models that are introduced on the market for the first time.
- Manufacturers may already start requesting WLTP approvals for new car types when the legislation comes into force in the European Union (no sooner than end July 2017).
- WLTP will apply to all new car registrations from September 2018.
- EU measures for end-of-series cars allow for a limited number of unsold vehicles in stock that were approved under the old test (NEDC) to be sold the following year, that is until September 2019.