Keyword: «source of law»
The article examines the role of legal custom as a source of law. Based on the analysis of ancient legal acts, the author identifies the reasons for the relevance of this source of law in the present time and analyzes the current legal situation.
The article examines the role of the system of guarantees of legality as a basic principle of state development. Based on the analysis of practice, the author identifies the reasons for the relevance of this issue at the present time and analyzes the current legal situation not only in Russia but also in foreign countries.

Marina V. Stakanova