s) Exercise primary authority to sign papers by authority of the Chairperson; t) Provide technical, consultative, research, fact-finding and advisory service to the Commission; u) Serve as the information arm of the NCIP; and v) Perform such other functions and duties as the Commission may direct. Part VII. Regional, Field and Other Offices Section 1. Regional Offices and Field Offices. The Commission shall operate and maintain sub-national offices such as the regional and field offices consistent with its mandate and organizational objectives, the NCIP shall operate and maintain Regional Offices. a) The regional offices shall be distributed according to equitable number of the clientele population. Regional centers shall be physically located in strategic geographical sites to maximize the delivery of basic services and technical support to ICCs/IPs. The distribution of resources shall be proportionate to the number of clientele and requirements of the ancestral domains/lands of ICCs/IPs located in each region. The distribution of the regional offices is as follows: (1) Ilocos Region - to serve the indigenous peoples in the Provinces of Ilocos Norte, Ilocos Sur, La Union, and Pangasinan; (2) Cordillera Region - to serve the IPs in the City of Baguio and the Provinces of Abra, Benguet, Mountain Province, Ifugao, Kalinga and Apayao; (3) Caraballo and Cagayan Valley Region - to serve the IPs in the Provinces of Batanes, Cagayan, Isabela, Quirino, and Nueva Viscaya; (4) Pinatubo and Northern Sierra Madre Region - to serve the IPs in the Provinces of Bulacan, Aurora, Nueva Ecija, Tarlac, Pampanga, Zambales, and Bataan; (5) Southern Sierra Madre and Bicol Region - to serve the IPs in the Provinces of Rizal, Quezon, National Capital Region, Camarines Sur, Camarines Norte, Albay, and Sorsogon; (6) Western Islands Region - to serve the IPs in the island Provinces of Palawan, Oriental Mindoro, Occidental Mindoro, and Romblon; (7) Central Philippine Islands Region - to serve the IPs in the island provinces of Antique, Aklan, Capiz, Iloilo, Guimaras, Cebu, Negros Occidental, Negros Oriental, and Bohol; (8) Zamboanga Peninsula Region - to serve IPs in the provinces of Zamboanga del Norte, Zamboanga del Sur, and Basilan; (9) Northwestern Mindanao Region - to serve the IPs in the provinces of Misamis Occidental, Misamis Oriental, Bukidnon and Camiguin; (10) Northeastern Mindanao Region - to serve the IPs in the Provinces of Surigao del Norte, Surigao del Sur Agusan del Norte, Agusan del Sur; (11) Southern and Eastern Mindanao Region - to serve the IPs in the provinces of Davao Oriental, Davao del Sur, Compostela Valley, Davao del Norte, South Cotabato, Sarangani, and the cities Davao, Tagum and Island Garden City of Samal; and (12) Central Mindanao Region - to serve IPs in the provinces of Lanao del Norte, North Cotabato, Sultan Kudarat, and the cities of Cotabato, Iligan and Marawi; Page 37