It depends on language in the contracts. Also, all this does would be for EDP and other pipelines to charge more for E&P companies that have "shaky" finances. According to analysts EDP has lowest counter party risk of the majors. The ruling hurts WMB -- but again you have to look at each contract on its own.
The ruling also said that is wasn't binding (I don't know what that means -- if the ruling isn't binding that what is the effect ? ).