https://www.devex.com/people/_understanding_what-is-the-hour-rule-in-klm-2412123
https://www.devex.com/people/_understanding_what-is-the-hour-rule-in-klm-2412123
https://www.devex.com/people/_understanding_what-is-the-hour-rule-in-klm-2412123
https://www.devex.com/people/_understanding_what-is-the-hour-rule-in-klm-2412123