First complaint. (3) On 14 March 2017, the Authority received a complaint (2) alleging that Trondheim municipality (‘the Municipal ity’) has granted unlawful state aid to Trondheim Spektrum AS (‘TS’), a company that owns and operates Xxxxx xxxx Spektrum, which is a multipurpose sport facility located in Trondheim, Norway. By letter dated 27 March 2017, the Authority invited the Norwegian authorities to comment on the complaint (3). The Norwegian authori ties replied by letter dated 2 June 2017 (4).