In order to accomplish its mission and objectives the IIID has established a two-tiered hierarchy, to maintain close contact with all the members spread over its Chapters and Centers. An Executive Committee at the Head Quarters in Mumbai and a Managing Committee at each Chapter/Centre is elected biannually from its core members. The President heads the Executive Committee at National level and a Chairperson each of the Managing Committees at the Chapters /Centers. There is an ongoing process of instituting new Regional Chapters/Centers – depending on the need perceived, as also the expected membership strength in the city or state. Presently Chapters are formed where core membership is a minimum of One hundred & fifty and Centers must have a minimum of thirty.