Requests the Secretary-General to establish an Investigative Team, headed by a Special Adviser, to support domestic efforts to hold ISIL (Da’esh) accountable by collecting, preserving, and storing evidence in Iraq of acts that may amount to war crimes, crimes against humanity and genocide committed by the terrorist group ISIL (Da’esh) in Iraq, to the highest possible standards, which should be addressed by the Terms of Reference referred to in paragraph 4, to ensure the broadest possible use before national courts, and complementing investigations being carried out by the Iraqi authorities, or investigations carried out by authorities in third countries at their request;