20 (9) The provisions of this Act on explorations and excavations of terrestrial and underwater archaeological sites shall supersede all local, muuicipal, regional and autonomous regional governments' resolutions and ordinances .. (b) When the presence of any cultural or historical property is discovered, the National Museum or the National Historical Institute shall immediately suspend all activities that will affect the site and shall immediately notify the local government unit having jurisdiction of the place where the discovery was made. The local government shall promptly adopt measures to protect and safeguard the integrity of the cultural property so discovered and, within five (5) days from the discovery, shall report the same to the appropriate agency. The suspension of these activities shall be lifted only upon the written authority of the National Museum or the National Historical Institute and only after the systematic recovery of the archaeological materials. (c) The Commission, upon the recommendation of the appropriate. cultural agency, shall provide incentives for persons who discover arid report heretofore unknown .archaeological sites, in accordance with its rules and regUlations implementing the provisions of this Act. (d) Any government or nongovernment infrastructure project or architectural site development shall include anthropological, archaeological and historical and heritage site conservation concerns in their Environmental Impact Assessment Systeni. ARTICLE VIII ROLE OF CULTURAL AGENCIES SEC. 31. Responsibilities of Cultural Agencies for Designation of Cultural Property. - The cultural agencies, in conformity with their respective charters and mandates, shall define and delineate their respective areas of responsibility with respect to cultural property and assessment of national cultural treasures and national historical landmarks, sites or monuments. These areas shall be subject to periodic re-assessment whenever necessary.