New legislation signed by President Ford in 1975 added 370,000 acres of land to Indian tribal holdings, benefiting 17 Indian Tribes. The land was previously purchased by the United States in the 1930s and is now held in trust for the Tribes. The purpose of the acquisition was to retire low-productivity land from private cultivation. The tribes receiving land included the Assiniboine and Sioux Tribes, Navajo Tribe, and several others. Additionally, the Laguna Pueblo Tribe received approximately 520 acres of land within their reservation boundaries.