Oregon Revised Statutes Public Financial Administration § 291.220

(1) The Governor, upon request, shall furnish the Legislative Assembly any further information required concerning the Governor's budget and the tax expenditure report.

(2) The Oregon Department of Administrative Services, upon request, shall furnish a representative to assist the Legislative Assembly, the Joint Committee on Ways and Means and the Legislative Revenue Officer in the consideration of the budget, the tax expenditure report and any accompanying measures.