Change in transfer system to affect possible Stones money

According to former Evertonian, Bob Latchford, who is just bringing out a new book and heading to launch it in Liverpool soon - a change in the transfer system (don't ask me what) would mean that Everton will benefit better financially after summer 2016. It is unlikely, therefore, that Stones will be sold in January, but that Everton are much more likely to cash in after summer 2016, when they will make more out of the deal. Anybody know what the change in the transfer system is about? Greater likelihood of a windfall for us after summer 2016.