TY JOUR TI On improving the system and structure of the Criminal Code of the Russian Federation KW system KW structure KW effectiveness of law enforcement KW aggravating circumstances KW constructive signs JO Vestnik of the St. Petersburg University of the Ministry of Internal Affairs of Russia AU Veklenko, S.V. PY 2025 IS 2025 PB SAINT-PETERSBURG UNIVERSITY OF THE MINISTRY OF INTERNAL AFFAIRS OF THE RUSSIAN FEDERATION