Oregon Constitution Art. XI-J § 2

Bonds of the State of Oregon containing a direct promise on behalf of the state to pay the face value thereof, with the interest therein provided for, may be issued to an amount authorized by section 1 of this Article for the purpose of creating such fund. The bonds shall be a direct obligation of the state and shall be in such form and shall run for such periods of time and bear such rates of interest as provided by statute.