Oregon Revised Statutes Public Financial Administration § 294.346

(1) Any municipal corporation, by ordinance or resolution of its governing body, may establish one or more reserve funds to hold moneys to be accumulated and expended for the purposes specified in ORS 280.050, without submitting the question of establishing the reserve fund to a vote of the electors. The municipal corporation may cause to be credited to any reserve fund all or any portion of the revenues derived from taxes levied under ORS 280.060 and any other taxes, charges or revenues as the governing body may determine. The municipal corporation may also limit the crediting of such taxes, charges or revenues to a reserve fund to a specific period of time designated by the governing body.

(2) Not less frequently than every 10th anniversary of the date upon which a reserve fund is established under subsection (1) of this section, the governing body of the municipal corporation shall review the reserve fund and determine whether the fund will be continued or abolished. When the governing body determines, by resolution, that it is no longer necessary to maintain such a reserve fund:

(3) This section does not apply to system development charges imposed under ORS 223.297 to 223.314, and no system development charges shall be credited to any reserve fund established under this section.