The legislature was redistricted under one-person, one-vote in the 1960s. It passed the Land Use and Development Law (Act 250) in 1970 to discourage suburban sprawl and to limit major growth to already developed areas. The law, the first of its kind in the nation, created nine District Environmental Commissions appointed by the Governor, who judged land development and subdivision plans that would have a significant impact on the state's environment and many small communities. As a result of Act 250, Vermont was the last state to get a Wal-Mart (there are now six Wal-Marts in the state, as of November 2017, but only three—in Williston, St. Albans, and Derby—were newly built from the ground up). Because of the successful attempts to dilute what is perceived as the original intent of Act 250, and other development pressures, Vermont has been designated one of America's most "endangered historic places" by the National Trust for Historic Preservation.