to vote to increase by three hundred and sixty-five thousand shares the authorized capital stock of the Bank; and

to subscribe on behalf of the United States to not more than seventy-three thousand and ten shares of the capital stock of the Bank: Provided, however, That not more than seven and one-half percent ($658,305,195) of the price of the shares subscribed may be paid in to the Bank on subscription, with the remainder of that price ($8,149,256,155) being subject to call only when a call on unpaid subscriptions is required to meet obligations of the Bank for funds borrowed or on loans guaranteed by it and not for use by the Bank in its lending activities or for administrative expenses: Provided further, That any subscription to such additional shares shall be effective only to such extent or in such amounts as are provided in advance in appropriations Acts.