Oregon Revised Statutes Elections § 255.062

Unless specifically provided otherwise, when the district elections authority of a district that holds regular district elections refers a measure to the electors of the district, the election on the measure shall be held on a district election date specified by the district elections authority in the order calling the election. The election date may not be sooner than the first available election date in ORS 255.345 (1) for which the filing deadline can be met after the date of the order calling the election and may not be later than the next regular district election following the 61st day after the date of the order.