Now YOU'RE kidding, right? ;)
True, RSK wouldn't go with it in 1991, but the Croats refused to even look at it. Therefore, Serbs were offered no autonomy by Croatia in real terms. There was no real offer on the table from the Croats that they refused. (That's not to say those criminals, Martic and Babic would have accepted it had there been one -- I doubt they would have, the selfish pigs.)
Abosolutely no offer at all was made in 1995. If you're talking aobut that hasty "peace" meeting on 3 August, the Serbs said yes to Z-4, while the Croats, of course, with all those troops massed and a public "green light" from Clinton, said "no way."
The selfish!? pigs thought Serbia was behind them, but they couldn't know there is even a bigger pig then both of them together in Belgrade(SM)!