THE CONSTITUTIONAL REFORM OF THE PUBLIC ADMINISTRATION SYSTEM IN THE USSR (LATE 80'S-EARLY 90'S OF THE 20TH CENTURY) Deryabina Ekaterina Semenovna, PhD in History, Associate Professor. <...> Position: Associate professor at State and Law chair. <...> Annotation: The article deals with proper using such terms as "system", "nonsystem", "intersystem" as regards the state legal institutions in conditions of transition from one social system to another. <...> The application of the system theory in studying the state and law for a transitional period is conditioned by the complicated processes taking place in state legal superstructure in the time of changing social systems. <...> Taking into consideration these categories it is possible to comprehend the peculiarities of coexistence of mutually exclusive state institutions (e.g. the institutions of Presidency and the Supreme Soviet in the USSR in the late eighties and in the early nineties of the XXth century) as well as the reasons of disparity between the republican legislation and the all-union one. <...> The article is devoted to some aspects of constitutional reform of public administration system in the USSR in the late 80's-early 90's of the 20th century. <...> The legal analysis of the constitutional reforms of 1988-1990 is taken as the basis. <...> It is concluded that the introduction of the institution of the President, the Congress of people's deputies, as well as changing the status of the Supreme Soviet of the USSR and the Constitutional Review Committee have contributed to the destruction of the soviet form of Government and a unified system of public administration. <...> Keywords: system, nonsystem, intersystem, constitutional reforms, public administration system, public authorities, the Supreme Soviet of the USSR, Congress of people's deputies, Institute of President, Constitutional Review Committee, electoral district, Soviets. <...> Zakon SSSR ot 20 dekabrja 1989 g. N 961-I «Ob utochnenii nekotoryh polozhenij Konstitucii (Osnovnogo Zakona) SSSR po voprosam porjadka dejatel'nosti S"ezda narodnyh deputatov SSSR, Verhovnogo Soveta SSSR i ih orРanov» (utratil silu) // Vedomosti SND SSSR i VS SSSR. – 20 dekabrja 1989. – № 28. – St. 538. – S. 736–738. <...> ГaФon SSSR ot 23 НОФabrУa 1989 Р. № 974-I «Ob izmenenijah i dopolnenijah st.125 Konstitucii SSSR»//ааа. <...> Access date: 20.02.13 g. ГaФon SSSR ot 2 <...>