Williams questions legality of 2008 rules
The boss of the Oxfordshire based team has already sided with Spyker's Colin Kolles in protest of Red Bull and Super Aguri's controversial plans for 2007, but Williams now hints that the legality of Max Mosley's rules for next year could also be challenged in a Swiss court.
Williams, 64, questions the use of customer cars even in 2008 by insisting that the revised rule is not supported by the new Concorde Agreement, which has not yet been completed.
"(FIA president) Max (Mosley) has got to tell us if the rules are going to change," he said.
"Why should (Prodrive's) David Richards come in with an investment of about (US $40m) while every other single team have worked hard to pay their bills?" the magazine Autosport reportedly quoted him as saying.
Williams suggests that teams like Prodrive should be allowed to race but not earn points or prize money, or that independent teams who build their own cars should receive compensation.
He said: "The rules are overt, you must make your own car. If you buy one from McLaren then you're not a constructor."