ORS 106.315 Prohibited and void domestic partnerships

A domestic partnership is prohibited and void when:

Either party to the domestic partnership had a partner or spouse living at the time of the domestic partnership unless the partner or spouse was the other party to the domestic partnership.

The parties to the domestic partnership are first cousins or any nearer of kin to each other, whether of the whole or half blood, whether by blood or adoption, computing by the rules of the civil law. However, when the parties are first cousins by adoption only, the domestic partnership is not prohibited or void.

When either party to a domestic partnership is incapable of making the civil contract or consenting to the contract for want of legal age or sufficient understanding, or when the consent of either party is obtained by force or fraud, the domestic partnership is void from the time it is so declared by a judgment of a court having jurisdiction of the domestic partnership.