(1) If both parties have made contractual dispositions in a contract of inheritance, the voidness of one of these dispositions results in the ineffectiveness of the whole contract.
(2) If revocation is reserved in such a contract, the whole contract is cancelled by the revocation of one of the contractual parties. The right of revocation expires on the death of the other contractual party. The surviving party may, however, if they disclaim the gift made to them by the contract, revoke their disposition by will.
(3) The provisions of subsection (1) and subsection (2) sentences 1 and 2 are not applicable if it is to be assumed that the parties intended otherwise.