The sum of $10,000, which was appropriated by section 2, chapter 424, Oregon Laws 1917, shall be considered a loan to the Tumalo Project and shall be returned to the General Fund, together with interest at the legal rate from the date on which the money is made available, from the receipts of the sale of project lands. All expenditures incurred under the provisions of ORS 555.340, 555.360 and 555.380 shall be paid at the same time and in the same manner as state officers, upon vouchers approved by the Water Resources Commission.
ORS 555.410