1. The carrier shall prepare for the passenger a seat in the agreed-upon class, and the latter may recover from the carrier the difference in case he is compelled to travel in a lower class than the one indicated on his ticket. 2. Where the passenger pays an additional fare against special benefits, he may claim that such additional fare be reimbursed to him if the carrier fails to provide the corresponding benefits.
Interpretation and application must be checked against the official text and current version.