A/HRC/21/50 51 final point to be made concerns the nature of the investigation that must be conducted to satisfy this obligation. The UN has developed guidelines for such investigations and they center around four universal principles: independence, effectiveness, promptness and impartiality.33 These four principles lie at the heart of human rights protection and are binding on UN members in that they have been relied upon and further developed in the jurisprudence of UN-backed international courts and also have been agreed upon by the States represented within the relevant United Nations bodies. VIII. State responsibility 25. Every internationally wrongful act of a State incurs the international responsibility of that State.34 Similarly, c...