Igor Sechin, the influential executive board chairman of Russian state-controlled oil producer Rosneft, has obtained initial backing from President Vladimir Putin for his plan to secure massive tax concessions for four large greenfields in East Siberia, writes Vladimir Afanasiev.

A copy of Sechin’s recent letter to Putin, obtained by Moscow business daily Vedomosti, requests authorities to remove a requirement to pay an oil production tax on output at these assets, as well as to reduce levels of a corporate profits tax and social insurance levies.