119In the present case, as the Commission confirmed at the hearing in response to a question from the Court, the activity by which the DGPC manages the Puerto de Las Nieves port infrastructure and makes it available to a user shipping company in return for the payment of port dues is indeed an ‘economic’ activity (see, by analogy, in respect of the management of airport infrastructures, judgments of 12 December 2000, Aéroports de Paris v Commission, T‑128/98, EU:T:2000:290, paragraphs 121 and 125, and of 24 March 2011, Freistaat Sachsen and Land Sachsen-Anhalt v Commission, T‑443/08 and T‑455/08, EU:T:2011:117, paragraph 93). Therefore, in such a situation, the Commission had to ascertain whether the DGPC had conferred an advantage on the intervener that it would not have had under normal conditions of competition by applying the test of a private investor acting in a market economy (see, to that effect, judgment of 17 December 2008, Ryanair v Commission, T‑196/04, EU:T:2008:585, paragraph 85).