22 U.S.C. § 283c

Unless Congress by law authorizes such action, neither the President nor any person or agency shall, on behalf of the United States, (a) subscribe to additional shares of stock under article II, section 3, or article IIA, section 2, of the agreement; (b) request or consent to any change in the quota of the United States under article IV, section 3, of the agreement; (c) accept any amendment under article XII of the agreement; or (d) make a loan or provide other financing to the Bank, except that loans or other financing may be provided to the Bank by a United States agency created pursuant to an Act of Congress which is authorized by law to make loans or provide other financing to international organizations. Unless Congress by law authorizes such actions, no governor or alternate appointed to represent the United States shall vote for any increase of capital stock of the Bank under article II, section 2, or article IIA, section 1, of the agreement or any increase in the resources of the Fund for Special Operations under article IV, section 3(g) thereof.