You may have heard of it – one of the leftovers of the Treaty of Lisbon is the question about the 18 missing MEP seats. The 2009 European Parliament elections were conducted under the old rules with a total of 736 MEPs, because the Treaty of Lisbon was not yet in force. Under the Treaty of Lisbon there had to be 754 MEPs. That is why 18 MEPs could not take their places unless a new Intergovernmental conference (IGC) was conducted, and a Treaty amendment was ratified.
This IGC has speedily approved the text of the amendment, and so has the European Parliament. But the 18 MEPs will only be able to take their places in the EP after the ratification process is concluded in all the 27 Member States.