(1) The disposition by the provisional heir of a plot of land or right in a plot of land that is part of the inheritance or of a registered ship or ship under construction that is part of the inheritance is, in the case where reversionary succession occurs, ineffective to the extent that it would frustrate or adversely affect the right of the reversionary heir.
(2) The same applies to the disposition of an object of the inheritance that is made free of charge or for the purpose of fulfilling the promise of a gift made by the provisional heir. Donations that are made to comply with a moral duty or to show consideration for decency are exempt.
(3) The provisions to the benefit of those who derive rights from an unauthorised person apply accordingly.