Original sentence: 18 clubs.Apart from this change in amount of teams there will also be a playoff to determine the champion and the European places.In the 2008-09 season the teams ending in 17th and 18th position will relegate and the teams in positions 15 and 16 will play a relegation playoff against two teams from the Belgian Second Division.On May 17, 2008, the Belgian Football Association decided that the Belgian First Division will consist of only 16 instead of 18 teams from the 2009-10 season on.The exact manner in which this playoff will be organised is also still under discussion, but there will probably be a split in the league after a certain amount of matchdays, so that there is one part of the league playing for the European places and one part playing against relegation.The exact manner of this playoff (4-team round robin or bracket system) is still unsure and is still under discussion, but only one of these four teams will play in the Belgian First Division in 2009-10, together with the Second Division Champion
Edited sentence: 16 clubs.19 clubs