45 The foregoing provisions notwithstanding, titles secured under the Torrens System, and rights already vested under the provisions of existing laws shall be respected. SEC. 3. As used in this Organic Act, the phrase "indigenous cultural community" refers to Filipino citizens residing in the autonomous region who are: (a) Tribal peoples. These are citizens whose social, cultural, and economic conditions distinguish them from other sectors of the national community; and (b) Bangsa Moro people. These are citizens who are believers in Islam and who have retained some or all of their own social, economic, cultural, and political institutions. SEC. 4. Cultural Communities. – The customary laws, traditions, and practices of indigenous cultural communities on land claims and ownership and settlement of land dispute shall be implemented and enforced among the members of such communities. SEC. 5. Ecological Balance. – The proclamations issued by the central government or national government declaring old growth or natural forests and all watersheds within the autonomous region as forest reserves are hereby reiterated. The forest reserves shall not be subjected to logging operations of any nature or kind. Forest concessions, timber licenses, contracts, or agreements of any kind or nature whatsoever granted by the central government or national government or by the Regional Government as of the date of the approval of this Organic Act, are hereby cancelled, nullified and voided, and shall not be renewed until thirty (30) years after the approval of this Organic Act. If the said forest reserves are logged over or are mined by authority or neglect of the Regional Government, the funds provided by the central government or national government including the internal revenue shares of the Regional Government