Two or more Geodetic Control points shall be used in the densification of horizontal controls using GPS. Project controls established using GPS must at least comply with the third (3 rd) order positional accuracy requirement set by NAMRIA. In case of project controls established using Total Stations or similar equipment, the area, measured in hectares, of the ancestral land/domain shall be the basis in determining the type of control to be used. Under such condition, the following type of control as prescribed under DENR Administrative Order (DAO) 98-12 (Revised Manual of Land Surveying Regulations in the Philippines): Area Less than 1,500 hectares More than 1,500 to 15,000 hectares More than 15,000 hectares Type of Control Tertiary Secondary Primary g. Perimeter Survey.The survey must be tied to existing reference points of acceptable accuracy established by NAMRIA, DENR, NCIP, and other recognized agencies pursuant to the Philippine Reference System of 1992(PRS-92). In areas where conventional survey instruments are to be used and sufficient control has already been established, survey and installation of monuments may be done simultaneously. Otherwise, the collection of survey data for each corner shall be made only after the installation of the monuments. Installation of monuments shall be supervised by NCIP Field Personnel or Survey Party. The survey team must note on the record sheets all observations and findings such as daily weather conditions, persons/entities met/coordinated with, daily activities as well as problems encountered affecting the conduct of the survey and the corresponding actions taken in response thereto. Proper coordination with the field offices shall be done to ensure successful completion of the project. The conduct of perimeter survey shall adhere to the principle of self-delineation in which the traditional boundaries shall be established to determine the metes and bounds of the ancestral domains/lands. However, if due to more recent agreements and community consensus, the applicant community decides that its claim is congruent to or delimited by political or administrative boundaries, the approved technical descriptions of these boundaries shall be adopted. Such agreements or community consensus shall be in the form of written resolution signed by the elders/leaders. Community members knowledgeable of the boundaries of the ancestral land/domain shall point out the sites/location where the monuments are to be installed. The survey team shall thereafter prepare a sketch showing the relative location of the markers and other related information such as traditional names of places. Documentation thereof shall include pictures explicitly showing the community representative pointing to the installed monuments and identified markers. If the area to be surveyed adjoins another ancestral land/domain, the representative/s from the adjoining ancestral land/domain, aside from being notified, shall send a community member knowledgeable of the boundaries of their land/domain to join the survey team. The agreement during the boundary conflict resolution shall be followed. h. Data Processing, Preparation of Survey Returns and Technical Report.The survey plan shall be prepared in accordance with cartographic standards and specific details prescribed in Sec. 86 hereof. It shall indicate the orientation, final boundaries, technical descriptions, footnotes, marginal information, natural landmarks/features, technical marks and other relevant details. It shall be conformed to by the authorized representatives of the applicant community. All documents that form part of the survey return shall be prepared in prescribed ADO Forms described in Sec. 87. i. Projection of Survey Plan. Within fifteen (15) days after the initial verification and projection of the survey returns, a copy of the sketch plans shall be furnished to the DENR, DAR and LRA for purposes of common projection in order to determine if there are titled properties and lands with approved surveys that overlap with the surveyed AL/AD. Consequently, said agencies shall issue either a certification of non-overlap or comments/remarks on the result of the projection. Page 19 of 26 Revised Omnibus Rules on Delineation and Recognition of Ancestral Domains and Lands of 2012