(1) The revocation of a disposition which is related to a disposition of the other spouse in the way described in section 2270 is to be effected during the lifetimes of the spouses in accordance with the provision of section 2296 governing revocation of a contract of inheritance. A spouse may not, during the lifetime of the other, make a new disposition mortis causa unilaterally revoking their original disposition.
(2) The right of revocation expires on the death of the other spouse; the survivor may, however, revoke their disposition if they disclaim the testamentary gift made to them. Even after the acceptance of the testamentary gift, the survivor is entitled to revoke in accordance with section 2294 and section 2336.
(3) If a testamentary gift has been given to a descendant of both spouses or of one of the spouses who is entitled to compulsory share, the provision of section 2289 (2) applies accordingly.