Criterion (iii): The Precolumbian Chiefdom Settlements with Stone Spheres of the Diquís illustrate the physical evidence of the complex political, social and productive structures of the Precolumbian hierarchical societies. All four sites show to differing degrees signs of the negative impact of past agricultural development and looting of archaeological sites. Finca 6 site also contains a collection of stone spheres confiscated following previous looting, the original locations of which mostly remain unknown. The legislation attributes exclusive legal authority over the archaeological sites to the State, represented by the National Archaeological Commission and the National Museum. For the future protection and conservation of the Precolumbian Chiefdom Settlements with Stone Spheres of the Diquís it also seems essential that Heritage Impact Assessments are undertaken for any proposed developments which might have the potential to negatively impact the property.