Oregon Revised Statutes Public Financial Administration § 293.300

Except for claims based on obligations incurred or expenditures made by the Legislative Assembly and its officers and committees, the courts and their officers and committees, the Secretary of State and State Treasurer in the performance of the functions of their constitutional offices and the Public Defense Services Commission, a claim for payment from any moneys in the State Treasury may not be paid if the claim is disapproved by the Oregon Department of Administrative Services. The department shall disapprove a claim if provision for payment thereof is not made by law and appropriation, the obligation or expenditure on which the claim is based is not authorized as provided by law or the claim does not otherwise satisfy requirements as provided by law.