Countries, where EWMD is present, have a main body known as a national chapter. It works on a national level, keeping in touch with the local chapters. It has the responsibility on national events, coordinates the communication between members within the country and communicates with the international level.
Local chapters are the smallest bodies of EWMDs structure, normally representing a city or a town. Still, they have an important role within their territory, organizing meetings for registered and potential members and coordinating events. The national chapter coordinates all the local chapters in each respective country.