The Commission will assess in particular whether Luxembourg tax authorities selectively derogated from provisions of national tax law in tax rulings issued to GDF Suez. They appear to treat the same financial transaction between companies of GDF Suez in an inconsistent way, both as debt and as equity. The Commission considers at this stage that the treatment endorsed in the tax rulings resulted in tax benefits in favour of GDF Suez, which are not available to other companies subject to the same national taxation rules in Luxembourg.