If a member consents to a reduction in its quota, the Fund shall, within sixty days, pay to the member an amount equal to the reduction. The payment shall be made in the member's currency and in such amount of special drawing rights or the currencies of other members specified, with their concurrence, by the Fund as is necessary to prevent the reduction of the Fund's holdings of the currency below the new quota, provided that in exceptional circumstances the Fund may reduce its holdings of the currency below the new quota by payment to the member in its own currency