 From January 1, 1893 to October 3, 1899, Ostrovsky was chairman of the Department of Legislation of the State Council.By an Imperial Rescript of April 26, 1899, Ostrovsky was made a Chevalier of the Order of St. Andrew.Ostrovsky was an honorary member of the Imperial Academy of Sciences, Chairman of the Museum of Applied Knowledge in St. Petersburg, and (from May 15, 1883) an Actual Privy Counsellor, a civilian rank equivalent to full general or admiral.