by the United Nations, United Nations Security Council Resolution 59
“ To allow duly accredited United Nations observers and other truce supervision personnel bearing proper credentials, on official notification, ready access to all places where their duties require them to go including airfields, ports, truce lines and strategic points and areas; (b) To facilitate the freedom of movement of truce supervision personnel and transport by simplifying procedures on United Nations aircraft now in effect, and by assurance of safe-conduct for an United Nations aircraft and other means of transport ”
