Under laws enacted in 2003, they may collaborate formally through the creation of metropolitan areas and inter-municipal associations. However, as experience with inter-municipal associations has been varied, the 2003 laws are under revision with a view to increasing collaboration among municipalities and, in particular, rationalising public infrastructure projects and developing management capacities (OECD, 2008a). The 2007 Local Finance Act introduced measures to further expand municipalities’ competencies and increase their revenues.