2011 ORS § 287A.140¹
Ad valorem tax levy to pay general obligation bonds
(1) In addition to other taxes imposed, a public body shall levy annually an ad valorem property tax on the taxable property within the boundaries of the public body in an amount that is sufficient, when added to other amounts available, to pay the principal of and interest on outstanding general obligation bonds issued by the public body.
(2) A public body may:
(a) Use the revenues collected under this section and earnings on the revenues only to pay the principal of and interest on general obligation bonds.
(b) Not use or divert taxes levied under subsection (1) of this section for another purpose while principal or interest remains unpaid on the bonds.
(c) If a surplus amount remains after the principal of and interest on an issue of general obligation bonds have been paid and the public body does not have other expenses related to the bonds, transfer the surplus moneys to a fund designated by the governing body of the public body. [2007 c.783 §67]