OR Rev Stat § 450.280 (2021)
2021 Oregon Revised Statutes|Volume : 12 - Public Health|Chapter 450 - Sanitary Districts and Authorities; Water Authorities|Section 450.280 - Circumstances and conditions under which State Treasurer may purchase sewerage system bonds.

(1) The State Treasurer may purchase from a district at private sale sewerage system bonds bearing interest at a rate agreed upon by the State Treasurer and the district. The bonds shall qualify for investment by the state only if the sewer connection charges and revenues of the sewerage system of the issuing district, after the payment of operation and maintenance expenses, are pledged wholly to the payment of the principal of and interest upon the bonds, and the issuing district shall covenant to levy ad valorem taxes upon all of the taxable property within its boundaries to meet deficiencies in the charges and revenues pledged, and only if the combined indebtedness for all public purposes, other than state or federal, within the boundaries of the district, including the proposed sewerage system indebtedness, but excluding obligations issued for other utilities that are self-supporting or self-liquidating or are approximately so, does not exceed 25 percent of the total real market value of all taxable property within the district as reflected in the last roll certified under ORS 311.105. The limitation shall apply only to districts that finance the costs of their sewerage systems under ORS 450.250 to 450.300. The limitation shall include the ratios of indebtedness to the total valuation, determined in like manner, of other subdivisions that overlap the district to an extent of more than 50 percent of the total value of the district. Indebtedness within the 25 percent limitation may be incurred by a district if approved by the electors of the district at an election called and held for that purpose. Notwithstanding that revenues may have been pledged to the payment of the principal of and the interest upon a particular issue of general obligation bonds owned by the state, the same revenues, with the approval of the State Treasurer, may be pledged to the payment of the principal of and the interest on additional issues of bonds purchased by the state from the district. The additional issues shall be on a parity with previous issues as to the pledge of charges and revenues. In order to complete the financing of a sewerage system, after bonds payable as to principal and interest from revenues and ad valorem taxation have been issued, the State Treasurer may purchase issues of general obligation sewerage system bonds of districts, payable only from ad valorem property taxes, provided such issues, together with other obligations of the district, do not exceed the debt limits specified in this section. (2) All bonds heretofore issued under authority of ORS 450.250 to 450.300 and sold to the state, and the proceedings under which they were issued, are approved, validated, ratified, and confirmed, and the bonds are the valid and legally binding general obligations of the issuing district. [1955 c.577 §7; 1957 c.121 §1; 1959 c.574 §2; 1971 c.647 §91; 1981 c.94 §39; 1981 c.804 §101; 1991 c.459 §403; 1995 c.79 §224]