This article aims to analyze the explanatory processes implemented in Algerian legislative discourse, particularly the law relating to the exercise of trade union rights. Our main objective is to highlight the different explanatory processes that enable the understanding and discursive structuring of the legal texts in question. This will involve, on the one hand, shedding light on the explanatory specificities that highlight the structural and functional aspects of the legal texts. The corpus chosen for study is produced in a context of legal productions determined by contextual data relating to the regulation of labor relations between employer and employee as well as the institutional definition of the exercise of trade union rights.