Minor Portion
The amount of gross proceeds of a tax-exempt bond issue that may be permanently invested at a materially higher yield than the yield on the tax-exempt bonds equal to the lesser of 5% of the sale proceeds of the bonds or $100,000.
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Useful Life
An accounting estimate of the number of years it is likely for an asset to remain in service for the purpose of cost-effective revenue generation. The Internal Revenue Service (IRS) employs Useful Life for various purposes applicable to Tax-Exempt Bonds.
