Re: Too late
"You need to actually change the rulebook."
That's assuming they are all following the rule book as written. I suspect the reason for this agreement is to catch out those who are breaking the rules by playing countries off against each other, eg telling country A that most revenue is from country B while telling B that it's actually from C and telling C that it's from A.
Changing the rules is also required of course, but that will take even longer.