Question 25/III - General charging and accounting principles to be applied to two-way multiple access international telecommunication services via satellite (continuation of Question 23/III studies which have been examined during the 1985-1988 study period) (This Question must be studied in liaison with Study Group I.) Reasons for the study Considering (a) the following three main multidestination service categories: - one-way point to multipoint service, - one-way multipoint to point service, - two-way multiple access service; (b) the results achieved by the CCITT in the field of definition and charging for point to multipoint telecommunication services via satellite, services which are the subject of Recommendations in F and D- Series; (c) the progress expected in the field of definition for other multidestination telecommunication services, in particular for two-way multiple access services; (d) the needs expressed by the customers in order to get, at regional as well as world level, two-way multiple access services, What charging and accounting principles are appropriate for two-way multiple access services via satellite?1