RCW 68.32.150

No vested right of interment gives any person the right to have his or her remains interred in any interment space in which the remains of any deceased person having a prior vested right of interment have been interred. No vested right of interment gives any person the right to have the remains of more than one deceased person placed in a single space in violation of the rules and regulations of the cemetery in which the space is located.