COMMISSION REGULATION (EC) No 1980/2006 of 20 December 2006 laying down transitional measures amending Regulation (EC) Νο 2076/2002 and Decisions 2001/245/EC, 2002/928/EC and 2006/797/EC as regards the continued use of certain active substances not included in Annex I to Directive 91/414/EEC by reason of the accession of Bulgaria (Text with EEA relevance)