As sources of sports law the doctrine of sports law of the Russian Federation names the regulatory legal acts of the Russian Federation and the regulations developed by non-state sports organizations, which is referred to as lex sportiva. With regard to the regulatory legal acts of the Russian Federation, it can be stated that they are classical sources of all branches of law. The same one cannot say about lex sportiva, which is inherent exclusively in sports law. Moreover, it is customary to perceive lex sportiva as a single complex of homogeneous norms. The author suggests that this approach is not entirely correct, and proposes to reconsider it. In this regard, this study is aimed at studying the lex sportiva as a complex system consisting of the regulations of non-state sports organizations, lex ludica and lex specialis. The author attempts to introduce such categories as lex ludica and lex specialis into the doctrine of the domestic sports law, which allow us to state that there is some heterogeneity of lex sportiva. In conclusion, the author outlines the structure of lex sportiva and attempts to determine the legal nature of individual elements of lex sportiva.