The TDAG meets between the World Telecommunication Development Conferences (WTDC) to advise the Director of the Telecommunication Development Bureau (BDT) on the implementation of the WTDC Action Plan, including issues relating to the budget and the operational plan of the ITU-D.

The TDAG is open to representatives of Member States, Sector Members and to chairmen and vice-chairmen of study groups. In addition, the Director may invite representatives of bilateral cooperation and development aid agencies, and multilateral development institutions to participate in the meetings.