Any bond for the payment and discharge of which, upon maturity or upon redemption prior to maturity, provision has been made through the setting apart in a reserve fund or special trust account created pursuant to this chapter to insure the payment thereof, of moneys sufficient for that purpose, or through the irrevocable segregation for that purpose, in some sinking fund or other fund or trust account, of moneys sufficient therefor, shall be deemed to be no longer outstanding within the meaning of any provision of this chapter.