The Secretary of the Treasury, after consultations with the Secretary of Agriculture and the Secretary of the Interior (to the extent appropriate) on markets and prices for commodities, shall periodically instruct the United States Executive Director of each multilateral development bank to work with other executive directors of the respective bank to continue to—

(1) support activities which result in broad increases in income and employment and enhance purchasing power in developing countries, particularly among the rural poor; and

(2) encourage diversification away from single crop or product economies in developing countries to help reduce wide fluctuations in commodity prices and the adverse impact of abrupt changes in the terms of trade.