The Singur Land Rehabilitation and Development Bill, 2011 has been passed in West Bengal Assembly amidst Left walkout. The bill was presented in the Assembly today to hand over 400 acres of land at Singur to the farmers who never accepted compensation for their land from the government. The historic Bill vested the 997 acres of the Nano plot with the government for eventual return of about 400 acre to those farmers. The principal aim of the Bill is to return land to the owners whose land was taken by the Buddhadeb Bhattacharjee administration for the what it called public purpose of setting up the country's first Nano factory of Tata Motors at Singur in Hooghly, about 40 km from Kolkata. Although the opposition Left Front was not against the bill in principle but on points of technicalities of the process in which the bill was brought and a few other points the Left Front staged a walk-out. The state government has argued that the land is being vested with the government as the plant was never commissioned. The Bill marks the delivery of the principal and first political promise of chief minister Mamata Banerjee, who as the opposition leader, vowed to return the land to the unwilling land losers. On May 18, 2006 former chief minister Buddhadeb Bhattacharjee and Tata Sons chairman Ratan Tata announced Singur as the location of the site for the production of the world's cheapest car. After continuous agitation by Mamata Banerjee, on October 3, 2008 Tata announced his exit from Singur.