Cruz and Europa v. Secretary of Environment and Natural Resources

for the Conservation of Natural Resources, Inc. (Haribon, et al.), filed a motion to Intervene with attached Comment-in-Intervention. They agree with the NCIP and Flavier, et al. that IPRA is consistent with the Constitution and pray that the petition for prohibition and mandamus be dismissed. The motions for intervention of the aforesaid groups and organizations were granted. Oral arguments were heard on April 13, 1999. Thereafter, the parties and intervenors filed their respective memoranda in which they reiterate the arguments adduced in their earlier pleadings and during the hearing. Petitioners assail the constitutionality of the following provisions of the IPRA and its Implementing Rules on the ground that they amount to an unlawful deprivation of the State's ownership over lands of the public domain as well as minerals and other natural resources therein, in violation of the regalian doctrine embodied in Section 2, Article XII of the Constitution: "(1) Section 3(a) which defines the extent and coverage of ancestral domains, and Section 3(b) which, in turn, defines ancestral lands; "(2) Section 5, in relation to section 3(a), which provides that ancestral domains including inalienable public lands, bodies of water, mineral and other resources found within ancestral domains are private but community property of the indigenous peoples; "(3) Section 6 in relation to section 3(a) and 3(b) which defines the composition of ancestral domains and ancestral lands; "(4) Section 7 which recognizes and enumerates the rights of the indigenous peoples over the ancestral domains; "(5) Section 8 which recognizes and enumerates the rights of the indigenous peoples over the ancestral lands; "(6) Section 57 which provides for priority rights of the indigenous peoples in the harvesting, extraction, development or exploration of minerals and other natural resources within the areas claimed to be their ancestral domains, and the right to enter into agreements with nonindigenous peoples for the development and utilization of natural resources therein for a period not exceeding 25 years, renewable for not more than 25 years; and "(7) Section 58 which gives the indigenous peoples the responsibility to maintain, develop, protect and conserve the ancestral domains and portions thereof which are found to be necessary for critical watersheds, mangroves, wildlife sanctuaries, wilderness, protected areas, forest cover or reforestation."[2] Petitioners also content that, by providing for an all-encompassing definition of "ancestral domains" and "ancestral lands" which might even include private lands found within said areas, Sections 3(a) and 3(b) violate the rights of private landowners.[3] In addition, petitioners question the provisions of the IPRA defining the powers and jurisdiction of the NCIP and making customary law applicable to the settlement of disputes involving ancestral domains and ancestral lands on the ground that these provisions violate the due process clause of the Constitution.[4] These provisions are: "(1) Sections 51 to 53 and 59 which detail the process of delineation and recognition of ancestral domains and which vest on the NCIP the sole authority to delineate ancestral