On 29 May 2017 a UEFA letter to the Bulgarian Football Union declared that CSKA Sofia, the runners-up of the 2016–17 First Professional Football League, were not allowed to compete in the Europa League as they were considered to have been re-formed as a new club and thus did not pass the "three-year rule". As this decision was appealed by CSKA Sofia, the Bulgarian Football Union granted a license to them subject to legal proceedings. A few hours prior to the Europa League first qualifying round draw, UEFA replaced them with Dunav Ruse, the fourth-placed team of the league. Proof Is At: [23]; Emails