ORS 319.550: User’s license required to use fuel; exceptions.

(1) Except as provided in this section, a person may not use fuel in a motor vehicle in this state unless the person holds a valid user’s license.

      (2) A nonresident may use fuel in a motor vehicle not registered in Oregon for a period not exceeding 30 consecutive days without obtaining a user’s license or the emblem issued under ORS 319.600, if, for all fuel used in a motor vehicle in this state, the nonresident pays to a seller, at the time of the sale, the tax provided in ORS 319.530.

      (3) A user’s license is not required for a person who uses fuel in a motor vehicle if, for all fuel used in a motor vehicle in this state, the person pays to a seller, at the time of the sale, the tax provided in ORS 319.530.

      (4) A user’s license is not required for a person who is subject to the weight-mile tax described in ORS 825.474 and 825.476 or the flat fee rate described in ORS 825.480.

      (5)(a) A user’s license is not required for a person who uses fuel as described in ORS 319.520 (7) in the vehicles specified in this subsection if the person pays to a seller, at the time of the sale, the tax provided in ORS 319.530.

      (b) Paragraph (a) of this subsection applies to the following vehicles:

      (A) Motor homes as defined in ORS 801.350.

      (B) Recreational vehicles as defined in ORS 174.101.

      (6) A user’s license is not required for a person who uses fuel in a motor vehicle:

      (a) Metered use by which is subject to the per-mile road usage charge imposed under ORS 319.885; and

      (b) That also uses fuels subject to ORS 319.510 to 319.880.

      (7) A user’s license is not required for a person who uses fuel in a motor vehicle on which an emblem issued for the motor vehicle pursuant to ORS 319.535 is displayed.