Lapsing of the institution in view of supervenience of descendants to the testator

The institution of heirs, made by a person who did not have legitimate children at the time of the Will, or was ignorant of having them, lapses de jure by the supervenience of children or other legitimate descendants, even though posthumous or by the legitimation of the illegitimate children. § 1 - The legitimation by recognition of illegitimate children, subsequent to the Will, born before or after it was made, does not annul the institution of heir, but reduces it to the disposable portion of the testator, as per article 1760. § 2 - The legacy does not lapse in any of the cases mentioned above, but may be reduced as inofficious as per the same article 1760.