The highest governing body of the IDDRG is the General Assembly, which is composed from the representatives of IDDRG member countries. Usually, the member countries are represented by the National Secretaries of each member country. National Secretaries are elected by the National Groups.
 
The General Assembly has its meeting usually in each second year (formerly during the Biennial Congresses). After the structural changes of IDDRG commenced in 2003, the General Assembly meeting is held during the IDDRG Conferences in every second year.