Najam Sethi said he was in the process of giving the PCB a democratic constitution.
Najam Sethi said the instability in the PCB is not good for cricket in Pakistan.
Islamabad High Court ruled that Zaka Ashraf's removal was illegal.
Javed Miandad sent his resignation letter to new PCB chief Najam Sethi.
Ashraf was reinstated as chairman of the board last month by the Islamabad High Court.
Zaka Ashraf has been sacked as the PCB chief by Pakistan's Prime Minister.
Rizvi has raised questions over the status of the interim management committee.
In October last year Nawaz Sharif became the patron of the PCB.
Sethi was asked to head PCB by Nawaz Sharif last year.
Zaka Ashraf said he would now act according to the full judgement and take charge soon.