The Budapest Group meets once a year, gathering senior officials from all participating states and organisations to discuss developments, to determine the main policy directions and to support the Process. In addition, expert Working Group meetings on various concrete topics are held in order to implement the adopted recommendations and conclusions, as well as to develop responses to emerging migration challenges. Among others, the Working Groups on return/readmission, visa harmonisation, irregular movements and asylum, black sea co-operation and the silk routes have been particularly active.