From the Saint-Gobain to the Metallgesellschaft Case: scope of non-discrimination of permanent establishments in the EC Treaty and the Most-Favoured-Nation Clause in EC Member States Tax Treaties - EC Tax Review View From the Saint-Gobain to the Metallgesellschaft Case: scope of non-discrimination of permanent establishments in the EC Treaty and the Most-Favoured-Nation Clause in EC Member States Tax Treaties by - EC Tax Review From the Saint-Gobain to the Metallgesellschaft Case: scope of non-discrimination of permanent establishments in the EC Treaty and the Most-Favoured-Nation Clause in EC Member States Tax Treaties 11 3 EC Tax Review