ORS § 496.168
The State Department of Fish and Wildlife shall estimate in advance the expenses that the department will incur during a biennium under ORS 496.167, and shall render to executive department agencies and other entities described in ORS 496.167 an invoice for their share of such expenses for periods within the biennium and in sufficient amounts to provide reasonable cash operating requirements for the department within the biennial period. Each agency or other entity described in ORS 496.167 shall pay to the credit of the department such invoice as an administrative expense from funds or appropriations available to the invoiced agency or entity in the same manner as other claims against the state are paid. If the estimated expenses for the agency or other entity described in ORS 496.167 are more or less than actual expenses for the period covered by the invoice, the difference shall be reflected in the next following estimate of expenses.
ORS 496.168
See note under 496.167.