This paper examines the issues of improving emergency legislation regulating the protection of the state from external aggression. Issues of ensuring the security of the state in modern conditions are becoming particularly relevant due to the increasing threats from third states. This circumstance necessitates the existence of an integrated system of norms governing the concept, types, and content of relevant administrative and legal regimes, as well as the grounds and procedure for their introduction, the nature and scope of restrictions established to ensure them, procedures and limits for the application of protective measures and the grounds for termination of such emergency regimes. The article analyzes the concept of “special military operation” and its relation to related terms. The author pays special attention to the systematization of the imposed restrictions depending on the response mode (level). Special attention is paid to administrative responsibility for violation of the established restrictions in accordance with the accepted level of response. Conclusions on the improvement of legislation are formulated.