The Law of the Russian Federation Amending the Constitution of the Russian Federation of March 14, 2020 No. 1-FKZ «On improving the regulation of certain aspects of the organization and functioning of public authority» has a special status in the legislative system. This Law serves as a form that fixes amendments to the Russian Constitution, as a basis for making changes to it, and as a legal confirmation that the text of basic law is legitimate. Unlike other similar laws of 2008 and 2014, it reflects the most extensive constitutional changes in Russia since the adoption of the Constitution of the Russian Federation on December 12, 1993. It contains not only constitutional novelties, but also establishes previously unknown in Russian constitutional practice institutions and procedures that ensure that the new constitutional norms enters into force. Its provisions are a guideline for further updating Russian legislation and the legal system as a whole. The commentary aims to make the goals and content of constitutional modernization, the specific historical meaning of amendments to the Russian Constitution, their conditionality to national interests and trends in global constitutional development as accessible and understandable as possible for the widest audience. The commentary to the Law of the Russian Federation Amending the Constitution of the Russian Federation is thematic; it is constructed in accordance with the main target units of its norms. This structure, according to the authors, makes it possible to reveal the will of the constitutional legislator in a more convenient format for the reader, as well as the provisions of the Law of the Russian Federation Amending the Constitution of the Russian Federation that are not subject to inclusion in the text of the Constitution and have direct effect. The publication is prepared by the co-chairs of the Working Group on the preparation of proposals for amendments to the Constitution of the Russian Federation, who are directly involved in the design of this Law and its discussions with the scientific community, representatives of civil society institutions, foreign experts and the Chambers of the Russian Parliament and legislative (representative) bodies of the constituent entities. The audience is a wide range of readers - representatives of state and local authorities, legal scholars and practitioners, as well as anyone interested in issues of constitutional building in Russia and abroad.