31 CFR § 342.10 - Reservations.
(a) Issue of notes. The Secretary of the Treasury reserved the right to reject any application for purchase of savings notes, in whole or in part, and to refuse to issue or permit to be issued hereunder any such notes in any case or any class or classes of cases if such action was deemed to be in the public interest. Any action in any such respect was final.
(b) Terms. The Secretary of the Treasury may at any time, or from time to time, supplement or amend the terms of this part, or of any amendments or supplements thereto.