(1) Any object restituted to the insolvency estate owing to contest of the transaction made by or vis-à-vis the deceased may not be used for performance of the obligations referred to in section 327 (1).
(2) Any property to be reimbursed to the insolvency estate by the heir under sections 1978 to 1980 of the Civil Code may only be claimed by creditors excluded under the proceedings offering the creditors of the estate the opportunity to file their claims or ranking among the excluded creditors under section 1974 of the Civil Code to the extent to which the heir would be liable to restitution of such property under the provisions governing the restitution of an unjust enrichment.