Review of the monograph by G.Z. Ostapenko "The Principle of Legal Determination: Theoretical and Applied Principles"

The monograph is devoted to the actual problem of applying the principle of legal certainty, which the author proposes to consider in the theoretical and law-enforcement plane. A number of works that previously raised the issue of the principle of legal certainty, new for Ukrainian legal science, although they noted its connection with the principle of the rule of law, still did not give a comprehensive answer either about its content or about its place in the system of legal principles. Therefore, the appearance of such a complex monograph, which raises a number of questions from philosophical and legal ideas that form the basis of the principle of legal certainty to the analysis of its content and applied aspects of application, is an important fundamental research that solves a topical issue for theoretical jurisprudence.In the complex social and political conditions in which Ukraine is developing its legislation with the aim of adapting it to the accession to the EU, it is important to maintain focus on the fundamental legal principles that serve as the main guidelines. It is important to apply the principle of legal certainty in the development of new normative legal acts, especially in the conditions of martial law, to ensure the inviolability of the rights and freedoms of a person and a citizen in circumstances when there are threats to this. It is absolutely important to apply the principle of legal certainty in the work of state authorities in conditions where decision-making is carried out within discretionary powers, which can lead to unequal application of the same provisions of the law and create a threat of ambiguity and inconsistency in law enforcement activities of state authorities. Given the above, the relevance of the topic of the monograph is beyond doubt.