Not sure why people are talking about legal action against the FFP rules. The laws governing the Football League clubs have been approved by the clubs voting at meetings. I think people are confusing the Uefa Champions league FFP implementation. Which may have been just applied to qualifying clubs etc. So perhaps they could take actiona??
However the FFP rules for the Championship were voted in by 21 of the 24 clubs, so 21 clubs cannot possibly take any action. The 3 that voted against it, how can they take legal action, they had a vote and lost.
If they did take action, the other 23 clubs could vote to expel them from the league or something similar.
Notts County, the FFP type rules again have been inforce for 3 seasons. This season all clubs in league one had their player budget cut by 5% down to 60% of revenue.
So to increase spending the revenue has to be increased.