The commission will look into public complaints, information and conduct prompt, impartial, comprehensive investigations against persons who had held or continue to hold political office and those who have been or continue to serve as public servants and officers of statutory bodies.
President Sirisena had announced to appoint the commission at the height of political crisis last year during which he had removed Ranil Wickremsinghe as the prime minister.
Sirisena had said that he will appoint the commission to probe wrongdoings against Wickremsinghe government.
Accordingly, a retired Supreme Court Justice Upali Abeyratne has been appointed the chairman of this commission of inquiry.
The commission has been instructed to submit an interim report within a three-month period and the final report, containing the conclusions and recommendations, within six months.
Relations between the President and Prime minister have been far from cordial with differences emerging on several aspects of governance.