Oregon Revised Statutes Public Financial Administration § 292.286

(1) Any officer or employee of a state agency who desires a cash advance for the expenses of travel and subsistence arising out of official duties or employment shall file a written request for the approval of such advance with the administrative head of the state agency by which the officer or employee is employed.

(2) The administrative head of the state agency by which the officer or employee requesting the advance is employed shall forward a copy of the written approval to the official authorized to disburse funds of such agency. The advance shall be paid from funds available to the agency for the payment of claims.

(3) The Oregon Department of Administrative Services shall make rules setting forth procedures for request and disbursal of travel advances provided in ORS 292.286 and 292.288.