Canoe Polo

Rules 
From the New Zealand Canoe Polo Assn site.
"New Zealand Canoe Polo has recently adopted the International Canoe Federation (ICF) Rules of Play. These will come in to effect from 1 January 2008 and will replace the NZ Rules at all national competitions"

There are some wee local variations like as playing time.

Copy of the rules here as PDF 
113 pages Hmmm!
Pages 40 - 80 most relevant.

Also this advisory on rules interpretation  as PDF

Hand Signals on the way