The reserva troncal is a special rule designed primarily to assure the return of the reservable property to the third degree relatives

That question has already been answered in Padura vs. Baldovino[3], where the reservatario was survived by eleven nephews and nieces of the praepositus in the line of origin, four of whole blood and seven of half blood, and the claim was also made that all eleven were entitled to the reversionary property in equal shares. This Court, speaking through Mr. Justice J.B.L. Reyes, declared the principles of intestacy to be controlling, and ruled that the nephews and nieces of whole blood were each entitled to a share double that of each of the nephews and nieces of half blood in accordance with Article 1006 of the Civil Code. Said the Court:
"The issue in this appeal may be formulated as follows: In a case of reserva troncal, where the only reservatarios (reservees) surviving the reservista, and belonging to the line of origin, are nephews of the descendant (prepositus), but some are nephews of the half blood and the others are nephews of the whole blood, should the reserved properties be apportioned among then equally, or should the nephews of the whole blood take a share twice as large as that of the nephews of the half blood?
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The case is one of first impression and has divided the Spanish commentators on the subject. After mature reflection, we have concluded that the position of the appellants is correct. The reserva troncal is a special rule designed primarily to assure the return of the reservable property to the third degree relatives belonging to the line from which the property originally came, and avoid its being dissipated into and by the relatives of the inheriting ascendant (reservista).
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The stated purpose of the reserva is accomplished once the property has devolved to the specified relatives of the line of origin. But from this time on, there is no further occasion for its application. In the relations between one reservatario and another of the same degree there is no call for applying Art. 891 any longer; wherefore, the respective share of each in the reversionary property should be governed by the ordinary rules of intestate succession. In this spirit the jurisprudence of this Court and that of Spain has resolved that upon the death of the ascendant reservista, the reservable property should pass, not to all the reservatarios as a class but only to those nearest in degree to the descendant (prepositus) excluding those reservatarios of more remote degree (Florentino vs. Florentino, 40 Phil. 489-490; T.S. 8 Nov. 1894; Dir. Gen. de los Registros, Resol. 20 March 1905). And within the third degree of relationship from the descendant (prepositus), the right of representation operates in favor of nephews (Florentino vs. Florentino, supra).
"Following the order prescribed by law in legitimate succession, when there are relatives of the descendant within the third degree, the right of the nearest relative, called reservatario, over the property which the reservista (person holding it subject to reservation) should return to him, excludes that of the one more remote. The right of representation cannot be alleged when the one claiming same as a reservatario of the reservable property is not among the relatives within the third degree belonging to the line from which such property came, inasmuch as the right granted by the Civil Code in Article 811 is in the highest degree personal and for the exclusive benefit of designated persons who are within the third degree of the person from whom the reservable property came. Therefore, relatives of the fourth and the succeeding degrees can never be considered as reservatarios, since the law does not recognize them as such.
"In spite of what has been said relative to the right of representation on the part of one alleging his right as reservatario who is not within the third degree of relationship, nevertheless there is right of representation on the part of reservatarios who are within the third degree mentioned by law, as in the case of nephews of the deceased person from whom the reservable property came. * * *." (Florentino vs. Florentino, 40 Phil. 480, 489-490) (Emphasis supplied) (See also Nieva and Alcala vs. Alcala and de Ocampo, 41 Phil. 915)
Proximity of degree and right of representation are basic principles of ordinary intestate succession; so is the rule that whole blood brothers and nephews are entitled to a share double that of brothers and nephews of half blood. If in determining the rights of the reservatarios inter se, proximity of degree and the right of representation of nephews are made to apply, the rule of double share for immediate collaterals of the whole blood should be likewise operative.
In other words, the reserva troncal merely determines the group of relatives (reservatarios) to whom the property should be returned; but within that group, the individual right to the property should be decided by the applicable rules of ordinary intestate succession, since Art. 891 does not specify otherwise. This conclusion is strengthened by the circumstance that the reserva being an exceptional case, its application should be limited to what is strictly needed to accomplish the purpose of the law. As expressed by Manresa in his Commentaries (Vol. 6, 6th Ed., p. 250):