We'd try to explain them to you, but we'll leave that to the experts.

Referred by the Board to the UPA Membership December 20, 2006. Approved by the Membership January 25, 2007.

http://www.upa.org/ultimate/rules/11th_proposed

Be sure to read the UPA Rules Blog found in the above link.  It's a long read, but does a nice job of explaining what the rules mean.