North Eastern Frontier Agency

The North-East Frontier Agency (NEFA) (formerly the North-East Frontier Tracts) was one of the political divisions in British India and later the Republic of India until 1972, when it became the state of Arunachal Pradesh. Its administrative headquarters was Shillong (until 1974, when it was transferred to Itanagar).

In 1914, some tribal-majority areas were separated from the erstwhile Darrang and Lakhimpur districts of Assam Province of British India to form the North-East Frontier Tracts (NEFT). The NEFT was initially divided into two sections: the Central & Eastern Section (comprising the erstwhile Dibrugarh Frontier Tract, created in 1882, and some more areas in south) and the Western Section. Each section was placed under a political officer. In 1919, the Central and Eastern Section was renamed as Sadiya Frontier Tract, while the Western Section was renamed as Balipara Frontier Tract. In 1937, Sadiya and Balipara Frontier Tracts along with Lakhimpur Frontier Tract (also created in 1919) of Assam Province came to be collectively known as the Excluded Areas of province of Assam under the provisions of Government of India Act, 1935. By Regulation 1 of 1943 (The North Eastern Frontier Tracts (Internal Administration) Regulation 1943) Tirap Frontier Tract was created by amalgamating certain areas of Sadiya and Lakhimpur Frontier Tracts, after which a new regulation named as THE ASSAM FRONTIER (ADMINISTRATION OF JUSTICE) REGULATION, 1945 was made by the Governor of Assam by exercising his power as given in subsection (2) of section 92 of Government of India Act, 1935. which prove to be a landmark step in history of NEFT, NEFA, later to emerging of state of arunachal Pradesh. In 1946, Balipara Frontier Tract was divided into two administrative units: Sela Sub-Agency and Subansiri Area.

After the independence of India in 1947, NEFT became a part of Assam state. In 1948, Sadiya Frontier Tract was bifurcated into two districts: Abor Hills district and Mishmi Hills district. In 1950, the plain portions of these tracts, (Balipara Frontier Tract, Tirap Frontier Tract, Abor Hills district and Mishimi Hills district) were transferred to the Assam state government and the rest became one of the Tribal Areas in Assam state (under part-B of the table appended to paragraph 20 of the sixth schedule of the Indian constitution). In 1951, Balipara Frontier Tract, Tirap Frontier Tract, Abor Hills district, Mishmi Hills district and the Naga tribal areas were together renamed as the North-East Frontier Agency (NEFA).

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