This is the one we need, the rule book from the box is out of date!
Here is the link http://www.ausbowl.com/. Just click on the living rulebook 5 underneath where it says file name.
So it’s possible to field Nurgle Rotters rather thean the normal Chaos Team. I think I might stay with Chaos and just upgrade my boys, even though Nurgle Rotters have some cool stuff they ain’t Slobby Don’s Puking Pus Buckets! (Dave)