On Monday (5 Oct) the Paris-based Organisation for Economic Cooperation and Development (OECD) will present its final Base Erosion and Profit Shifting (Beps) project corporate tax reform proposals and on Tuesday the Ecofin council of EU finance ministers, is expected to agree on the exchange of tax rulings between member countries. These commitments or so-called letters of comfort to multinational companies typically confirm the limits or exceptional tax advantages that they can be assured of in a particular country.