Users of ISO 9001:2000 will have up to two years to upgrade their systems to ISO 9001:2008

All accredited certifications issued will be to ISO 9001:2008 by the end of 2009. By the end of 2010, existing certification issued to ISO 9001:2000 will no longer be valid. Customers will need the revised version of ISO 9001 in order to keep their certificates up to date.