What categories of foreign employees have to exam in Russian language, history and fundamentals of Russian law?

Under recent amendments to Russian immigration law, regular foreign employees entering Russia on a visa basis and regular foreign employees entering Russia on a non-visa basis must pass an exam in Russian language, history and the fundamentals of Russian law in order to obtain work permits. Citizens of the countries of the Eurasian Economic Union and HQS are exempt from this requirement. The exam may be only taken in a number of certified educational institutions in Russia.