On 11 December 2017, the Council adopted a decision establishing Permanent Structured Cooperation (PESCO), less than a month after receiving a joint notification by member states of their intention to participate.
The 25 member states participating in PESCO are: Austria, Belgium, Bulgaria, Czech Republic, Croatia, Cyprus, Estonia, Finland, France, Germany, Greece, Hungary, Italy, Ireland, Latvia, Lithuania, Luxembourg, the Netherlands, Poland, Portugal, Romania, Slovenia, Slovakia, Spain and Sweden. On 13 November 2017, ministers from 23 member states signed a joint notification on the Permanent Structured Cooperation (PESCO) and handed it over to the High Representative and the Council. On 7 December 2017, Ireland and Portugal also notified their decision to join PESCO.
Read more on the website of the Council of the European Union.