The airlines are required to provide you a copy of all of the rules at your request. Some of them hide them on their Web sites, some of them will mail them to you, and ALL of them (at least in the US) are required to give you a copy at a city ticket office or airport ticketing desk.

In my experience, they're less than happy about doing it because the contract is somewhat long. The rules change on occassion, so rather than having them printed in advance, they'll usually have to print them on the spot, which takes time.

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