I. Introduction In one of its last judgments of 2012, the Court of Justice (“CJEU”) ruled that public financing provided for the construction of a new runway at the State-owned Leipzig-Halle airport is subject to State aid rules.1 In its decision, the CJEU confirmed the ruling of the General Court2 in all material points. The CJEU held that operating the airport runway constituted an economic activity which was inseparable from its construction. The operation of the runway was seen as