Rules controlling State aid and subsidies on the EU and the WTO level can have a decisive influence on both regulatory and distributive decision-making. This field of law has grown exponentially in importance and complexity over the past decades. Rules on State aid and subsidies control are one of the key instruments to ensure that public spending and regulatory measures do not lead to discriminatory distortions of competition. As a consequence, hardly any part of national law is free from review under criteria of State aid and subsidy regulation. In turn, State aid and subsidies law is...