6 (y) "Intangible cultural property" shall refer to the peoples' learned processes along with the knowledge, 'skills and creativity that inform and are developed by them, the products they create and the resources, spaces and other aspects of social and natural context necessary for their sustainability. (z) "Library" shall refer to an institution where the collection of books, manuscripts, computerized information and other materials are organized to provide physical, bibliographic and/or intellectual access to the public, with a librarian that is trained to provide services and programs related to the information needs of its clientele. (aa) "Museum" shall refer to a permanent institution that researches, acquires, conserves, communicatss and exhibits the material evidence of humans and their environment for purposes of education or leisure. (bb) "National cultural treasure" shall refer to a unique cultural property found locally, possessing outstanding historical, cultural, artistic andlor scientific value which is highly significant and important to the country and nation, and officially declared as such by pertinent cultural agency. (cc) "Nationally significant" shall refer to historical, aesthetic, scientific, technical, social andlor spiritual values that unify the nation by a deep sense of pride in their various yet common identities, cultural heritage and national patrimony. (dd) "Natural property of cultural significance" shall refer to areas possessing outstanding ecosystem with .flora and fauna of national scientific importance under the National Integrated Protected Areas System. (ee) "NCCA Portal Cultural Databank" refers to the .specific domain in the Commission's intranet for cultural information that is accessed only internally with control and confidentiality. It includes the registry of national cultural property. (ff) "Prehistory" shall refer to the period of human history before the introduction of the' forms of writing.