1) person with frisbee can’t run with it 2) defense can’t contact (tackle, hack, pick, etc.) the offense to impede their throwing or running 3) can’t play “dirty” (ie, cheat), because there are no referees and participants are responsible for upholding the “Spirit of the Game.” http://answers.yahoo.com/question/;_ylt=… “Ultimate” is a high energy, fast-paced, field sport. Played on a rectangular field (40 yards wide, 70 yards long), with two endzones (40 yards wide, 25 yards deep), Ultimate is a team sport with 7 players per side (substitutions allowed between points – or for injuries). The objective is to complete a pass to a teammate in the endzone for a point. A point starts when the two teams line up on opposite endzone lines, facing each other. The defending team “pulls” (like punting in american football)