According to the agency, Article 15.3 of the Law on Information became the basis for entry into the register. 

It is noted that this article assumes that access to the Internet page may be limited if it contains, in particular, calls for mass riots, extremist activities or participation in mass events in violation of the established order.

Earlier, the Moscow City Court recognized the Anti-Corruption Foundation *, the Foundation for the Protection of Citizens' Rights ** and Navalny's Headquarters *** as extremist organizations. 

* The Anti-Corruption Foundation is included in the register of NPOs performing the functions of a foreign agent, by decision of the Ministry of Justice of the Russian Federation dated 09.10.2019

** The Foundation for the Protection of Citizens' Rights was included in the register of NPOs performing the functions of a foreign agent, by decision of the Ministry of Justice of the Russian Federation dated December 25, 2020.

*** "Navalny's headquarters" - the organization is recognized as extremist, its activities are prohibited on the territory of Russia by the decision of the Moscow City Court of 06/09/2021.