Oregon Constitution Art. XI-F(1) § 2

Indebtedness shall not be incurred to finance projects described in section 1 of this Article unless the constructing authority conservatively estimates that the constructing authority will have sufficient revenues to pay the indebtedness and operate the projects financed with the proceeds of the indebtedness. For purposes of this section, “revenues” includes all funds available to the constructing authority except amounts appropriated by the legislative assembly from the General Fund.