Some of the materials on onetravel.com rules of the air are out of date. The C of C in effect at the time of ticket purchase determines your rights and the airlines obligations.

As a ticket holder on a US airline you have a right to receive a complete up to date copy of the Contract of Carriage, don't be afraid to call and ask for your copy!

Making sense of the document is, of course, without extensive legal education, another thing.