Management of the renewable natural resources in Madagascar is gradually being transferred to the local communities. However, these local communities are struggling to assess the consequences of the management plans they must develop and implement on sustainability, within concurrent regulatory contexts. From this Malagasy case, we derived, from a law anthropology perspective, a generic model called MIRANA. From a social perspective, MIRANA formalizes institutions as sets of constitutive and regulatory norms, defining multiple layered territories, and multiple perspectives on the agents and resources. From an individual perspective, MIRANA specifies agents ’ behaviors as a combination of subsistence, production, and contractual relations, accounting for a multiplicity of normative and incentive structures to compromise and to implement. MIRANA allows to analyze the impact on sustainability of agents ’ behaviors submitted to concurrent normative orders, in a context of law pluralism.