The additional protocol, in which the dispute was settled and an appropriate wording was found, was signed as recently as May 2008 by Portugal, Spain, France and Morocco, and finally, on 25 March 2009, it was also signed by the European Union.
Protocolul adiţional, prin care s-a rezolvat disputa şi s-a găsit o formulare corespunzătoare, a fost semnat în mai 2008 de către Portugalia, Spania, Franţa şi Maroc şi, în final, la 25 martie 2009, acesta a fost semnat şi de Uniunea Europeană.