This summary follows the WMO 2014 English edition, the current text from the body that makes the rules; The European Mahjong Association continues to name the 2006 "Green Book" as the reference for its MERS ranking tournaments, alongside its own Tournament Regulations and Referee Manual, official...
Why people argue about this
People often assume that only the 2014 WMO English edition applies for all Mahjong MCR tournaments, forgetting about local regulations or other editions like the 2006 "Green Book." The confusion arises because different tournament bodies might use varying editions based on their preference and what they consider authoritative.
