Section 26: When the principal is to be repaid.

All the stock which may be created under the provisions of this Act shall be redeemable at par on a date to be named in that behalf by the Federal Government when issuing the stock, such date not being later than sixty years from the date of issue:
Provided that the President may reserve the option to redeem the stock in whole or in part, by drawings or otherwise, at any time prior to such date on such conditions as may be declared at the time of issue. From and after the date appointed for the redemption of the stock or any part of it all the interest on the principal moneys represented thereby shall cease and determine, whether payment of the principal shall have been demanded or not.