The announcement regarding the change of the political group was made by the President of the European Parliament, Jerzy Buzek, in the recent plenary session of the European Parliament from 22 to 25 November 2010.
https://www.europarl.europa.eu/sides/getDoc.do?pubRef=-//EP//TEXT+PV+20101122+ITEM-005+DOC+XML+V0//RO
For further information, please access the Romanian version.
