The EMA Riichi Rules have been slightly revised. The revised version is effective as of March 1, 2012.
Some cases of ambiguity have been clarified, scoring examples have been added and rules on etiquette and tournament play introduced. The uma (winner bonus) have been increased to 30,000/10,000/-10,000/-30,000. Double yakuman have been removed, except for Big Four Winds.
Translation of the rules are underway in several countries.