The Tripura Tribal Areas Autonomous District Council (TTAADC) was established…

The Sixth Schedule to the Constitution (Articles 244(2) and 275(1)) provides for the administration of tribal areas in the states of Assam, Meghalaya, Tripura, and Mizoram through Autonomous District Councils (ADCs). These councils can make laws on subjects such as land, forest management, village administration, and customary law, and can set up their own courts to try tribal disputes.

TTAADC was first constituted by a Tripura state legislative Act in 1982, and was then brought under this Sixth Schedule framework by the Constitution (Forty-ninth Amendment) Act, 1984 (effective from 1985), giving it constitutional status as an Autonomous District Council alongside the ADCs already functioning in Assam, Meghalaya, and Mizoram.

The other schedules named in the options govern entirely unrelated subjects:

• First Schedule -- lists the names and territorial extent of the States and Union Territories of India.

• Eighth Schedule -- lists the officially recognised languages of India.

• Tenth Schedule -- contains the anti-defection provisions for disqualification of MPs/MLAs.

Since TTAADC's constitutional basis is specifically the tribal-areas administration provision, the correct schedule is the Sixth Schedule.