Question 5/III - Development of tariff principles for international telecommunication services to meet the specific requirements of certain categories of users that are not covered by the international private leased circuit service as defined in Recommendations D.1, D.2 and D.3. The study will include continued consideration of Recommendation D.6 (continuation of Question 5/III studied in 1985-1988) Reasons for the study For the study of this Question, the following factors should be specially taken into consideration: 1) the potential of existing and/or planned public networks to satisfy the demand for telecommunication services sought by users in specialized private networks; 2) the tariff arrangements that might be appropriate for customers inclined to favour specialized private networks for economy reasons and whose requirement might be satisfied as far as possible by the means identified in 1. It is also desirable to take the following points into consideration: a) requests for the establishment of specialized private networks normally arise from the unique system requirements of certain categories of users as well as the technical and/or economic advantages that might be derived from using these networks, given certain prevailing market conditions, tariff structures and technical requirements. Administrations are sometimes unable to satisfy these requirements and this may lead some users to press for the creation of specialized private networks which are not permitted under Recommendation D.1 and only exceptionally under Recommendation D.6; b) administrations may experience adverse economic effects from the considerations identified in a) above; c) certain users may experience adverse effects from the lack of timely, cost-effective solutions of their particular problems; d) recommendations are needed concerning the provision of specialized services by administrations; e) there is an increasing demand by users for specialized services and, consequently, an increasingly urgent need for appropriate studies.