Soviet of the RSFSR. In June 1991, the charter was adopted by the Bank of Russia. On 20 December 1991 the State Bank of the USSR was abolished and all its assets, liabilities and property in the RSFSR were transferred to the Central Bank of the Russian Federation (Bank of Russia), which was then renamed to the Central Bank of the Russian Federation (Bank of Russia). Since 1992, the Bank of Russia began to buy and sell foreign currency on the foreign exchange market created by it, establish and publish the official exchange rates of foreign currencies against the ruble. Role and duties According to the constitution, it is an independent entity, with the primary responsibility of protecting the stability of the national currency, the ruble. Before 1 September 2013, it was the main regulator of the Russian banking industry, responsible for banking licenses, rules of banking operations and accounting standards, serving as a lender of last resort for credit organizations. After pointed date functions and powers of CBR were significantly expanded and the central bank received the status of a mega-regulator of all financial markets of Russia. It holds the exclusive right to issue ruble banknotes and coins through the Moscow and St. Petersburg mints, the Goznak mint. The central bank issues commemorative coins made of precious and non-precious metals as well as investment ones made of precious metals, which are distributed inside and outside the country. In 2010, in honor of its 150th anniversary it issued a 5-kilo commemorative gold coin Alexander II. Under Russian law, half of the bank's profit must be channeled into the government's federal budget. The Central Bank of Russia is a member of the BIS. The Bank of Russia owns a 57.58% stake in Sberbank, the country's leading commercial bank. The Bank of Russia owns as well 100% stake in Russian National Reinsurance Company (RNRC), biggest national reinsurance company. RNRC was established in July 2016 for prevention possible problems with abroad reinsurance of large risks under International sanctions during the Ukrainian crisis, like constructing the Crimean Bridge. Anti-fraud activities A key prospective witness in improper financial affairs was Lyubov Tarasova () who was a senior auditor for the Central Bank of Russia and worked for the "Unicom" () auditing firm which had been established on 20 August 1991 and was responsible for "checking the correctness of the documentation and the essence of business