Direct flights to Northern Cyprus and the trade traffic through the Northern Cypriot ports are restricted as part of the embargo on Northern Cypriot ports. The airports of Geçitkale and Ercan are only recognised as legal ports of entry by Turkey and Azerbaijan. Direct charter flights between Poland and North Cyprus started on 20 June 2011. The seaports in Famagusta and Kyrenia have been declared closed to all shipping by the Republic of Cyprus since 1974. By agreement between Northern Cyprus and Syria, there was a ship tour between Famagusta and Latakia, Syria before the outbreak of the Syrian Civil War. Since the opening of the Green Line Turkish Cypriot residents are allowed to trade through ports recognized by the Republic of Cyprus.