France, Belgium, and the United Kingdom have agreed on the criteria to be used for a cross-border child abduction alert. The agreement came during a three-day seminar held this May 2010 at the French Ministry of Justice in Paris. The countries agreed to the minimum criteria set in the 2008 European Commission guidelines to issue alerts if "it is a proven abduction or there are clear elements indicating that it could be a case of abduction." Police and prosecutors also gathered to discuss best practices, identify key contacts, coordinate their efforts and build trust. Another meeting took place in July to discuss how agencies should share case evidence during an alert and to prepare for a mock exercise on September 15.