It is also a matter for each Member State to decide, in accordance with the provisions of the Treaty of Lisbon and any domestic legal requirements, whether to participate in permanent structured cooperation or the European Defence Agency.
Is faoi gach Ballstát atá sé freisin a chinneadh, i gcomhréir le forálacha Chonradh Liospóin agus le haon cheanglais dhlíthiúla baile, an nglacfar páirt i mbuanchomhar struchtúrtha nó sa Ghníomhaireacht Eorpach um Chosaint.