The official site is
http://www.vision.net.au/~mhorton/oberwald.html
However, the best place to find it is in the world's largest Blood Bowl Library since it has so much other useful stuff

http://www.midgardbb.com/
then select Oberwald Library
For those who don't know about Oberwald it is the Online Bllodbowl Enthusiast's Reference With Assembled League Doctrines. It is totally unofficial but tries to cover all those gray areas that cause confusion.
Most regulars here will have no need of it because they already know all these rules.

It may be useful for leagues to use for an instant decision during a game, then they can ask the gurus here for an official ruling later. In most cases major issues discussed here in the last 12 months have been included using the consensus view.
I have not included a list of changes from previous editions because there were changes on almost every page. A lot of variants and alternates were removed because they have been clarified in LR or they were only used because the previous BB versions were unsatisfactory to many coaches.
I no longer update the Oberwald supplement because Galak's web site (see above) has far more unofficial ideas than I can keep up with.

If you find obvious errors

