Ministerial Decree recognising the area of "Valle Averto" as wetland of international importance, according to the Convention on Wetlands of International Importance signed in Ramsar on 2 February 1971.

The Decree concerns the declaration of the wetland of "Valle Averto", contiguous to the wetland defined by Ministerial Decree of 10 February 1989, as wetland of international importance, pursuant to the Convention on Wetlands of International Importance signed in Ramsar on 2 February 1971.