A. To make descendants liable to collation, as prescribed in the preceding Articles, they must appear in the quality of heirs to the succession of the ascendants from whom they immediately have received the gift or legacy.
B. Therefore, grandchildren, to whom a gift was made or a legacy left by their grandfather or grandmother, after the death of their father or mother, are obliged to collate, when they are called to the inheritance of the grandfather or grandmother, jointly with the other grandchildren, or by representation with their uncles or aunts, brothers or sisters of their father or mother, because it is presumed that their grandfather or grandmother had intended to make the gift, or leave the legacy by anticipation.