In accordance with the Letter of Invitation from His Excellency the President of the Democratic Socialist Republic of Sri Lanka, the IIGEP is charged with the following responsibilities:

Observe investigations and inquiries conducted by the National Commission of Inquiry, with a view to satisfying that such inquires are conducted: 1) in a transparent manner, and 2) in accordance with basic international norms and standards pertaining to investigations and inquiries;

Provide technical or other advice to the Commission of Inquiry on any particular matter at the request of the Commission of Inquiry;

Report observations to His Excellency the President upon completion of every three months;

Report observations to His Excellency the President at the completion of investigations and inquiries conducted by the Commission of Inquiry, with special reference to whether such inquires were conducted in accordance with basic international norms and standards;

Report observations regarding the final Report of the Commission of Inquiry.