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<br />2350 <br /> <br />of the Tribal Council. The remammg 2 percent of the land is in <br />allotment to individuals who hold title to the land allotted to them. <br />Administration' of the Reservation is shared by the Tribal Council <br />of the Colorado River Indian Tribes and the Department of the <br />Interior, Bureau of Indian Affairs. The Tribal Council has executive <br />and legislative powers on the Reservation. The Council may contract <br />with Federal, State, and local governments and advise and consult <br />with representatives of the Interior Department and other Federal <br />agencies on activities that affect the Reservation. The Bureau of <br />Indian Affairs, through its Colorado River Agency at Parker, admin- <br />isters a broad range of assistance and advisory programs, including <br />land management and irrigation operation. The Bureau of Indian <br />Affairs constructed the irrigation and drainage systems on the <br />Reservation and is engaged in a program of system expansion and <br />rehabilitation. <br />Irrigated agriculture is the principal enterprise on the Reser- <br />vation and provides the tribes with income. Most of the agricultural <br />land is farmed by commercial farm operators under long-term and <br />short-term agricultural leases. The exception is a tribal fann of <br />approximately 4,200 acres whose manager is an employee of the Tribal <br />Council. The Council also derives income from residential leases and <br />recreational-resort leases along the Colorado River. <br />Irrigation and Drainage <br />In 1974, 65,655 acres of land were irrigated on the Reservation <br />on the Arizona side, and in 1976, 72,377 acres. Figure 1 shows the <br />expansion of irrigated acreage in the last two decades. Further <br />expansion of irrigated agriculture is contemplated by the Tribes. <br />The Secretary of the Interior has certified 107,588 acres of <br />Reservation land to be irrigable, and the Supreme Court Decree of <br />March 9, 1964 (Arizona v. California) confirmed this acreage and <br />stipulated the Reservation's entitlement to Colorado River water to be: <br /> <br />6 <br />