Oregon Revised Statutes Public Borrowing § 287A.195

(a) The amount of interest to be paid on bonds, whether paid currently or deferred, is not taken into account.

(b) For a zero coupon bond or other original discount bond on which periodic interest payments are not made, only the accreted value of the bond on the date the bond is issued is taken into account.

(c) If a bond is issued to a provider of a credit enhancement device for a bond that is subject to a debt limit, the bond issued to the provider must be taken into account only to the extent that the amount of the bond issued to the provider exceeds the amount of the bond secured by the credit enhancement device.

(d) A public body may deduct from the amount of outstanding indebtedness:

(a) The public body has set aside in an irrevocable escrow government obligations, as defined in ORS 287A.375, the receipts from which have been calculated by a certified public accountant or other experienced professional to be sufficient, without reinvestment, to pay the principal, interest and premium, if any, due on the bond at maturity or on prior redemption; or

(b) The public body has complied with the provisions in the documents authorizing the bond that govern payment or defeasance of the bond.