Decision 10 G.R. No. 221139 same indigenous cultural communities as the exclusive objects of the application of customary laws and practices. As such, Chapter IX is a means to effect the overarching right of indigenous peoples to self-governance and empowerment, as spelled out in Chapter IV. In turn, the Indigenous Peoples' Rights Act's provisions on selfgovernance and empowerment, 44 along with those on the right to ancestral domains, 45 social justice and human rights, 46 and cultural integrity, 47 collectively reflect and bring to fruition the 1987 Constitution's aims of preservation. The 1987 Constitution devotes six (6) provisions "which insure the right of tribal Filipinos to preserve their way of life" :48 ARTICLE II Declaration of Principles and State Policies SECTION 22. The State recognizes and promotes the rights of indigenous cultural communities within the framework of national unity and development. ARTICLE VI The Legislative Department SECTION 5. (2) The party-list representatives shall constitute twenty per centum of the total number of representatives including those under the party list. For three consecutive terms after the ratification of this Constitution, one-half of the seats allocated to party-list representatives shall be filled, as provided by law, by selection or election from the labor, peasant, urban poor, indigenous cultural communities, women, youth, and such other sectors as may be provided by law, except the religious sector. 49 44 45 46 47 48 49 Rep. Act No. 83 71 (1997), ch. IV. Rep. Act No. 8371 (1997), ch. III. Rep. Act No. 8371 (1997), ch. V. Rep. Act No. 83 71 ( 1997), ch. VI. J. Puno, Separate Opinion in Cruz v. Secretmy of Environment and Natural Resources, 400 Phil. 904, 960 (2000) [Per Curiam, En Banc]. Const. Art. VI, sec. 5. I