Manohar was elected unopposed as the ICC's first independent chairman - one not affiliated to any of its member boards - in May 2016 for a two-year term, and since then had led the effort to decentralise the power held by the BCCI, CA and ECB.
In February this year, the ICC had passed in principle a new constitution that undid much of the imbalance in power and finances the Big Three had attempted to create in 2014, but a final decision was to be taken at the ICC Board's next round of meetings in April. Manohar, however, will now not be the head of the ICC at those meetings.
In a letter addressed to ICC chief executive David Richardson, Manohar said: "I have tried to do my best and have tried to be fair and impartial in deciding matters in the functioning of the Board and in matters related to Member Boards along with the able support of all Directors. However, for personal reasons it is not possible for me to hold the august office of ICC Chairman and hence I am tendering my resignation as Chairman with immediate effect. I take this opportunity to thank all the Directors, the Management and staff of ICC for supporting me wholeheartedly. I wish ICC all the very best and hope it achieves greater heights in future."