76 under articles V and VII of the General Convention, even though they are not staff members. These persons have also been referred to as “officials other than Secretariat officials”. 2. The United Nations also has experts who perform assignments for the Organization. Article VI of the General Convention provides that experts (other than officials coming within the scope of article V) shall be accorded privileges and immunities necessary to enable them to carry out their missions for the United Nations and specifies a number of those privileges and immunities. These experts have been referred to as “experts on mission”. 3. The Regulations and the commentary, as applied to the Chairman and the Vice-Chairman of the International Civil Service Commission, the Inspectors of the Joint Inspection Unit and other officials and experts who perform functions in respect of the common system, in accordance with the statute of the International Civil Service Commission or that of the Joint Inspection Unit, respectively, or other mandates approved by the General Assembly or other relevant main bodies and organs of the United Nations, should be construed in the light of those functions and mandates. References to the United Nations or the United Nations Organization in the context of these Regulations and the commentary should be applied, bearing in mind that the functions of those officials and experts are related to the common system. 4. Regulation 1 (a) is similar to the second sentence of staff regulation 1.1 (a).b Regulation 1 (b) Officials and experts on mission shall make the following written declaration witnessed by the Secretary-General or an authorized representative: “I solemnly declare and promise to exercise in all loyalty, discretion and conscience the functions entrusted to me by the United Nations, to discharge these functions and regulate my conduct with the interests of the United Nations only in view, and not to seek or accept instructions in regard to the performance of my duties from any Government or other source external to the Organization.” Commentary Regulation 1 (b), which is similar to staff regulation 1.1 (b), contains the declaration of office of officials and experts on mission. In view of the system-wide functions of the International Civil Service Commission and the Joint Inspection Unit, the term “United Nations” in the b  Hereinafter, references to staff regulations and rules denote the provisions contained in article I of the Staff Regulations and chapter I of the 100 series of the Staff Rules that came into effect on 1 January 1999, pursuant to General Assembly resolution 52/252.