Oregon Constitution Art. XI-Q § 2

(1) Indebtedness may not be incurred under section 1 of this Article if the indebtedness would cause the total principal amount of indebtedness incurred under section 1 of this Article and outstanding to exceed one percent of the real market value of the property in this state.

(2) Indebtedness incurred under section 1 of this Article is a general obligation of the State of Oregon and must contain a direct promise on behalf of the State of Oregon to pay the principal, premium, if any, and interest on the obligation. The full faith and credit and taxing power of the State of Oregon must be pledged to payment of the indebtedness. However, the State of Oregon may not pledge or levy an ad valorem tax to pay the indebtedness.