The second option would imply an international agreement, in addition to the EU treaties, which would legally bind participating countries, enabling them to commit to establishing a genuine economic union, and to define the organs and rules that will govern their cooperation.
第二种选择意味着欧元条约之外的国际协议，该协议将对参与过产生合法约束，促使它们承诺建立真正的经济联盟，并确定约束合作行为的规则。