REGULATORY AND LEGAL FRAMEWORK AND APPLICATION OF THE PRINCIPLE OF PROPORTIONALITY IN CONDUCTING COVERT INVESTIGATIVE (SEARCH) ACTIONS UNDER MARTIAL LAW . ВКАУ [Internet]. 2025 Aug. 20 [cited 2025 Sep. 13];35(2):213-2. Available from: https://vca.univd.edu.ua/index.php/vca/article/view/558