Official Rules (pdf)View as a web page.Rules Summary (for a quick overview)
Revised March 28, 2010. The following comment was added at the end of section 5.B. "In tournament play, unless asked, the referee shall not correct player positions until a service sequence fault has occurred by a serving or receiving team."
Revised August 19, 2010. The ball size was revised to 2 3/4 - 3 inches (was 2 7/8 - 3).