Software systems are increasingly becoming distributed, open and ubiquitous assets. While open system components are often autonomous, they behave unpredictably when unforeseen situations arise. Taming this uncertainty is a key issue for dependable open software development. This work proposes law enforcement approach that uses fault tolerant strategies to develop dependable open systems. Despite all the research done in the last years on the development of fault-tolerant applications and of approaches to enforce secure interaction protocols in multi-agent systems, there is no mechanism which uses the law elements of interaction’s control which improves the agent criticality analysis. As we will see, this mechanism would increase dependability of those systems. Thus it is proposed a solution to achieve it through the integration of the DimaX framework, which is a framework for dynamic replication, and the XMLaw, which is composed by a declarative language for specifying the norms of the systems and a framework for implementing the law enforcement approach for regulating agents’ interaction.