71 United Nations organs to carry out missions or functions for the United Nations (for example, rapporteurs of the Commission on Human Rights, rapporteurs and members of its Subcommission on the Promotion and Protection of Human Rights and members of the International Law Commission). 4. 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. Article VII, section 26, of the General Convention provides that facilities similar to those specified in section 25 (concerning applications for visas and facilities for speedy travel) shall be accorded to experts and other persons who are travelling on the business of the United Nations. 5. The Regulations contained in the present bulletin will apply to officials other than Secretariat officials, and to experts on mission. The Regulations are in most parts very general since they must apply to all officials other than Secretariat officials, and experts on mission. However, the application of the Regulations and the commentary to officials other than Secretariat officials, and to experts on mission who perform functions in respect of the United Nations and other organizations in the common system in accordance with their mandates (e.g., the Chairman and Vice-Chairman of the International Civil Service Commission and the Inspectors of the Joint Inspection Unit), is explained in various provisions of the Regulations and the commentary (see, e.g., regulation 1 (f), paragraph 3 of the commentary to regulation 1 (a) and the commentary to Regulation 1 (b)). The Regulations contained in the present bulletin will form part of the contract of employment or terms of appointment of any individual, including officials other than Secretariat officials, and experts on mission, who are appointed through Assembly action or through the actions of other representative bodies. Role of the commentary 6. Each provision of the Regulations set out in the present bulletin is followed by a commentary. The commentary is designed to explain those provisions and will thus be of help to those persons subject to the Regulations. The commentary is not part of the Regulations adopted by the Assembly, and so is not a legal norm; nor does it have the legal force of a rule. It is, however, an official guide published by the Secretary-General on the scope and application of the Regulations. The commentary will be updated from time to time in the light of experience gained in applying the Regulations to specific instances.