UPDATE: The 11th edition has been approved! Changes are to take effect immediately. Check out the UPA's website below or see our copy of the rules posted in the first section.

The official rules have undergone revision that may be approved this January. If you are a UPA member be sure to vote! If they are approved, the rules will change for the spring season.

In the US, Ultimate is governed by the Ultimate Players Association (UPA). Most of our games are played under their rules found on the UPA website

The World Flying Disc Federation (WFDF) governs Ultimate internationally. Their rules, slightly different from the UPA's, are found  on their website 
They are also revising their rules and an update is ecpected by early March 2007.