GAA Special Congress delegates have voted in favour of a Central Council motion, which radically overhauls the All-Ireland Senior Hurling Championship.
From next year the Munster and Leinster Hurling Championships will be played in a round robin format, with the top two contesting the final.
Clare, Limerick, Tipperary, Waterford and Cork will each playoff in Munster with two home and two away games for each team, while the Leinster championship will be between Galway, Wexford, Kilkenny, Offaly and Dublin.
The third place team will play in the All-Ireland hurling quarter-finals against the beaten provincial finalists.
The Tier 2 championship will include the four counties currently in the Leinster championship qualifier group and two other counties based on finishing positions in 2017 championship.
It would be run on a round-robin basis with the top two teams contesting the final. The finalists from the Tier 2 competition meet the third-placed teams in Munster and Leinster in the All-Ireland preliminary quarter-finals.
