 Pedzisa mutsara unotevera: Musi wa12 June 2008, pakaitwa referendamu yekubvumidzwa kwechibvumirano cheLisbon. Ikoku kwakakundwa, noruzhinji rwa 46.6 kusvika ku53.4. Musi wa15 October 2009, imwereferendamu yechipiri yakaitwa pamusoro pekubvumidzwa kwayo, iyo yakabvumidzwa ne67.1 kusvika ku32.9. 