Pursuant to RA No. 6975, otherwise known as "Rules and Regulations Implementing the DILG Act of 1990," specifically Rule III, Section (12)(c)(4), the NBOO, is mandated to establish and update the Masterlist of Barangays Barangay Officials and Barangay Socio-Economic Profiles. 

In compliance thereto, the Barangay Information System was developed to expeditiously gather, encode, store and maintain data related to barangays, in effect resulting to a systematized manner of accumulating and retrieving relevant data that are essential in coming up with informed decisions on various governance issues.