 Technically, an IFL is defined as an area which contains forest and non-forest ecosystems minimally influenced by human economic activity, with an area of at least 500 km2 (50,000 ha) and a minimal width of 10 km (measured as the diameter of a circle that is entirely inscribed within the boundaries of the territory).Areas with evidence of certain types of human influence are considered "disturbed" and not eligible for inclusion in an IFL