A legacy for education lasts until the legatee is of age, or beyond the age of majority in order that the legatee may finish some professional, vocational or general course, provided he pursues his course diligently.
A legacy for support lasts during the lifetime of the legatee, if the testator has not otherwise provided.
If the testator has not fixed the amount of such legacies, it shall be fixed in accordance with the social standing and the circumstances of the legatee and the value of the estate.
If the testator or during his lifetime used to give the legatee a certain sum of money or other things by way of support, the same amount shall be deemed bequeathed, unless it be markedly disproportionate to the value of the estate. (879a)