16 teams in Group A and Group B (8 each), single round-robin league (7 matches/team). Top 2 of each group advance to the Champions tier (SF1/SF2/Final); 3rd-8th of each group advance to the Challengers tier (6 knockouts, NRR-ranked into QLF1/QLF2, SF1/SF2, Final). Knockout-stage matches are added once the league stage completes and real qualifying teams are known.