These investigations must be conducted in accordance with the Treaty and in particular with the Protocol on the Privileges and Immunities of the European Communities, while respecting the Staff Regulations of Officials and the Conditions of Employment of Other Servants of the Communities (hereinafter referred to as "the Staff Regulations"), and with full respect for human rights and fundamental freedoms, in particular the principle of fairness, for the right of persons involved to express their views on the facts concerning them and for the principle that the conclusions of an investigation may be based solely on elements which have evidential value.