Interesting point to bear in mind regarding the carry over of the £20M sala contingency is that it's only a balance sheet item and not actually cash. It's just a prudent accounting contingency to future proof the balance sheet should the decision go against the club.
City do not have the cash at bank to meet an impending obligation either in part or fully and would have to borrow it - that source is unlikely to be Tan. If the money has to be paid, it would probably be phased over a few years and the borrowings and interest accrued on it would follow that path.
Of course if the decision goes totally for City (unlikely), then that would improve the club's balance sheet no end. That's nothing to do with the annual P&L sheets which will be unnaffected either way and will still have to operate within the FFP rules.