Thanks to Graz Bike Polo, in Austria, who have translated the NAH rules into German.
The original English ruleset is the only one applicable to NAH tournaments (we hope to change this sooner rather than later, at least for Spanish and French), this may be very useful for those whose first language is German, and would like to use our ruleset.
http://graz.bikepolo.at/cms/wp-content/uploads/NAH_4.3-Deutsch-BPA-Version_final.pdf.