Veselov M. Administrative and legal groundwork for the functioning of juvenile justice in the system of ensuring children’s rights in Ukraine.

The development of the object and subject of research involves the substantiation of the statement that the institution of ensuring children’s rights in the conceptual sense should be built on the principle of «subsidiarity». The analysis of legal acts and consideration of age, mental and social factors contributed to the formation of the idea of correlation of basic juvenile legal concepts and terms (child, juvenile, minor). The concept of the system of children’s rights is enhanced. The author introduces the vision of the structural and elemental composition of the system of ensuring children’s rights which is formed by the primary elements; components of a more complex level (forms or institutions); combinatorics of elements grouped by areas of public administration.