Artikel 21

1. Whenever necessary to meet contractual payments of interest, other charges or amortization on the borrowing of the Bank, or to meet its liabilities with respect to similar payments in respect of loans guaranteed by it and chargeable to its ordinary capital resources, the Bank may call an appropriate amount of the unpaid subscribed callable capital in accordance with paragraph 4. of article 7 of this Agreement.
2. In cases of default in respect of a loan made out of borrowed funds or guaranteed by the Bank as part of its ordinary operations, the Bank may, if it believes that the default may be of long duration, call an additional amount of such callable capital not to exceed in any one year one per cent of the total subscriptions of the members, for the following purposes:
a. To redeem before maturity, or otherwise discharge, its liability on all or part of the outstanding principal of any loan guaranteed by it in respect of which the debtor is in default; and
b. To repurchase, or otherwise discharge, its liability on all or part of its own outstanding borrowing.