When there are several owners of a plot or right of interment, they may designate one or more persons to represent the plot or interment right and file written notice of designation with the cemetery authority. In the absence of such notice or of written objection to its so doing, the cemetery authority is not liable to any owner for permitting the placement in the plot or right of interment upon the request or direction of any co-owner of the plot or right of interment.
RCW 68.32.100