Such registration must be effected within 6 months from the date of the gift inter vivos, or from the death of the testator. The effect of the registration of gifts inter vivos within such delay, as regards third parties whose claims are registered, is explained in the Book respecting Registration of real Rights. As regards all other parties, and in cases of substitution by will, registration within the same delays has a retroactive effect to the time of the gift, or to that of the death. If it takes place subsequently, its effect commences only from its date.