With the emergence of the digital transition, the need to control the processing of digital information has significantly increased. In the EU in particular, Law Enforcement Agencies (LEAs) are caused to exchange information. In recent years, many regulations have emerged to control data processing and exchange. Texts other than the GDPR, such as the “Law Enforcement Directive (LED)”, appeared to regulate specifically their data processing. And although many new formalisms have emerged to represent legal norms and rules, few are provided with a reasoning mechanism. The explainability of the results of systems using these formalisms also remains a major issue when dealing with critical decision situations. This paper aims to propose a framework to operate formal rules from regulations and guide a user in its decision process in a situation of data processing by LEAs by focusing on both the operability of the rules through reasoning and the explainability of the results from the reasoning.