I believe the same rule is included in all manufacturers' warranties. Though I know some dealers will let you get by with it (as long as the corporation hasn't found out and told them not to). I do agree that it's messed up that Subaru gives SCCA memberships but doesn't allow you to race. I know plenty of people that own EVOs, wrxs,etc. that don't legally race. Same goes for the srt4, if they catch you racing they could void the warranty on it, even though it was basically made for young people to tear up.
