Refunding
A transaction in which refunding bonds are issued and their proceeds are used to pay off outstanding bonds.
A Refunding in which all Refunded Bonds are redeemed within ninety days of the issuance of the Refunding Bonds.
See Also
A transaction in which refunding bonds are issued and their proceeds are used to pay off outstanding bonds.
A type of refunding transaction in which the refunding bonds are issued more than 90 days before the redemption or final maturity, whichever is earlier, of the refunded bonds.

Rule outlined in Section 147(b) of the code that states private activity bonds are not tax-exempt bonds if the weighted average maturity of the bond issue exceeds 120% of the average reasonably expected economic useful life of the facilities financed with the bond proceeds.