Considering the relationship between any subjects of constitutional law, it should be noted that their interaction is the most effective and efficient. In this study, it is perceived as an analogue of the category “cooperation”; partnership is also considered as one of the components of this social phenomenon. Studying the essence of interaction between the actors under consideration allows us to understand the mechanisms and legal basis for its implementation for the subsequent modernization of legal regulation, based on the actual practice of its implementation, as well as on the needs of society and naturally occurring social processes.