DepEd Order No. 56, series 2011, was issued for the information and guidance of all concerned schools to adopt the standards for Philippines school libraries nationwide, in order to render quality service to their pupils. These standards have been formulated by the Professional Regulation Commission through the Professionals Regulatory Board for Librarians as mandated by the Government under Article 2 section 8 of Republic Act No. 9246 known as the Philippine Librarianship Act of 2004 "to adopt policies and standard for all types of libraries, librarians and the practice of librarianship and to come up with minimum standards that define the basic resources required for a functional library in the Philippines setting.
You can download the document here: http://www.deped.gov.ph/cpanel/uploads/issuanceImg/DO%20NO.%2056,%20S.%202011.pdf