What is the 24-hour rule for Lufthansa?What is the 24-hour rule for Lufthansa?What is the 24-hour rule for Lufthansa?What is the 24-hour rule for Lufthansa?What is the 24-hour rule for Lufthansa?What is the 24-hour rule for Lufthansa?What is the 24-hour rule for Lufthansa?What is the 24-hour rule for Lufthansa?What is the 24-hour rule for Lufthansa?What is the 24-hour rule for Lufthansa?
