(1) Sections 2259 and 2263 are to be applied accordingly to the contract of inheritance.
(2) A contract of inheritance which contains only dispositions mortis causa may be withdrawn from official or notarial custody and returned to the contractual parties. The return may only be made to all of the contractual parties jointly; the provision of section 2290 (1) sentence 2 subsection (2) and (3) applies. If a contract of inheritance is revoked in accordance with sentences 1 and 2, section 2256 (1) applies accordingly.