https://community.articulate.com/discussions/articulate-engage/what-is-the-24-hour-rule-lufthansa-quick-guide-1a4c2bad-65f6-431c-9d5b-22c9df43c457
https://community.articulate.com/discussions/articulate-engage/what-is-the-24-hour-rule-lufthansa-quick-guide-1a4c2bad-65f6-431c-9d5b-22c9df43c457