Pub. L. 93-198, tit. IV, pt. E, subpt. 2, sec. 473
notes redeemable prior to maturity
notes redeemable prior to maturity Sec. 473. No notes issued pursuant to this part shall be made pay-able on demand, but any note may be made subject to redemption prior to maturity on such notice and at such time as may be stated in the note.