Predloženi ustavni sporazum kojim bi se pomoglo u uklanjanju postojećih institucionalnih barijera za daljnje širenje bloka stavljen je na led prošle godine, nakon što su ga na posebnim referendumima odbacili glasači u Holandiji i Francuskoj.
A proposed constitutional treaty that would have helped remove the existing institutional barriers to the bloc's further expansion was put on ice last year after Dutch and French voters rejected it in separate referendums.