 By this agreement, Serbia, through its network of diplomatic and consular missions, provides consular services to the Montenegrin citizens on the territory of states in which Montenegro has no missions of its own.On 1 January 2010, the Government officially invalidated all non-biometric Montenegrin passports, even if the expiry date was beyond 1 January 2010.Because non-biometric Montenegrin passports were no longer considered valid travel documents from that date onwards, holders were obliged to apply for new biometric Montenegrin passports in order to travel.