Oregon Revised Statutes Property Rights and Transactions § 97.570

(1) The spouse of an owner of any plot containing more than one interment space has a vested right of interment of the remains of the spouse in the plot, and any person thereafter becoming the spouse of the owner has a vested right of interment of the remains of the person in the plot if more than one interment space is unoccupied at the time the person becomes the spouse of the owner.

(2) The purchase by a married person of more than one interment space shall create in the spouse a right of interment therein.