The Tanw Supuñ Dùukuñ (TSD) or the Apatani Apex Council is the apex organization of the Apatani community of Arunachal Pradesh, India. It was launched with fanfare on November 29, 2014 in the Subansiri Stadium, Ziro. The TSD is mandated to represent the community on issues of common interests concerning all. Its objectives include promotion of social harmony among all sections of the society and also to oversee the interest of the people and place of the Apatanis.
The organization comprises of a Central Executive Body (CEB) and an Advisory Board, both of which are primarily based at Ziro, Lower Subansiri District. The Governing Council, the permanent body of the organization, which is based in Itanagar, oversees the functioning of the CEB. In addition, there are units in all the districts of Arunachal Pradesh and some states of the country.
The Apatani-based organizations that have pan-Apatani jurisdiction in their thematic areas of work are eligible to be affiliated to the TSD.