R.A. 1160 created the National Resettlement and Rehabilitation Administration (NARRA) which administered a total of 23 resettlement areas, nine of which were in Mindanao

Source: https://www.mindanews.com/mindaviews/2020/12/angay-angay-lang-the-minoritization-of-the-indigenous-communities-of-mindanaw-and-sulu-6/