The Survey of India published a map showing the McMahon Line as the official boundary in 1937.[38] In 1938, two decades after the Simla Conference, the British finally published the Simla Accord as a bilateral accord and the Survey of India published a detailed map showing the McMahon Line as a border of India. In 1944, Britain established administrations in the area, from Dirang Dzong in the west to Walong in the east.