In Italy public law 144 approved in 1999 stated that for any public project with investment costs exceeding 10 million Euro the "ordinary" instrument of analysis was to be the feasibility study aand for projects exceeding 50 million euro it was mandatory to present a feasibility study with a full economic evaluation of the project. A series of interpretive secondary norms, together with already established procedures, subsequently made clear that such an evaluation, although it could be extended to other forms of economic assessment , whould have to be based on cost benefit analysis.