The transformation of the subjects of the Russian Federation began with the territorial division of the country in regional policy. The Federal Constitutional Law of 2001 obliged to observe the procedure before the start of the unification of subjects, in order to achieve a positive result in such a complex process. The article analyzes the reasons for the unification of the Krasnoyarsk Territory, Taimyr (Dolgan-Nenets) and Evenki Autonomous districts. A set of measures aimed at the implementation of the formation of a new subject of the Russian Federation is being considered. The problems faced by the Krasnoyarsk Territory and autonomous okrugs during the unification period are revealed and the role of the Legislative Assembly of the Krasnoyarsk Territory in the unification process is reflected. The significance of the political figures of the Krasnoyarsk Territory who took part in the creation of a new subject of the Russian Federation is reflected. In addition, the highest authorities – the President of the Russian Federation and the Central Election Commission of the Russian Federation - were also involved in the unification process.