ORS 317A.158: Local taxes preempted.

(1) Except as expressly authorized by this section, the authority to impose, in this state, a tax upon the commercial activity of an entity is vested solely in the Legislative Assembly. A city, county, district or other political subdivision or municipal corporation of this state may not impose, by ordinance or other law, a tax upon commercial activity or upon receipts from grocery sales.

      (2) Subsection (1) of this section does not apply:

      (a) To any tax, or to subsequent amendments of the provisions of any tax, if the ordinance or other law imposing the tax is in effect and operative on April 1, 2019, or is adopted by initiative or referendum petition at an election held prior to March 1, 2019; or

      (b) To the imposition of privilege taxes not measured by commercial activity, franchise fees or right-of-way fees.