An amendment to add that the Secretary of Energy is authorized and directed to deliver to the Hilltop and Gray Goose Irrigation Districts, South Dakota, electric pumping power from the Pick-Sloan Missouri Basin Program at rates to be determined by the Secretary, but in no case less than the firm power rate for the sale of such power. Such power shall be made available under the same terms and conditions as presently used for firm power customers of the Eastern Division of the Pick-Sloan.