New Delhi, Sep 21 Commerce and Industry Minister Piyush Goyal said on Monday that India would first study the details of US tariffs that could be imposed on buyers of Russian oil under the new law, before taking up discussion on the matter “at an appropriate time.”The minister was responding to questions here on the 'Lindsey O. Graham Sanctioning Russia and Iran Act of 2026' that has just been signed into law by US President Donald Trump. The new law clears the way for the US administration to impose tariffs of up to 100 per cent on countries that continue…