Charleroi has submitted a formal notice to the KBVB. The club demands to stay in the Challenger Pro League and calls the last season by the U23 quota 'illegal'. Olympic Charleroi is of the opinion that the last season was illegal. Via an email, the club has sent a statement with explanation. According to them, the competition can be seen as illegal due to the U23 quota that was used. The club from Charleroi was relegated, but hopes to stay in the Challenger Pro League despite this. Club manager Marcel Gevart sent a statement. 'To demand their participation in the Challenger Pro League for the 2026/2027 season and to refer to the recognized illegality of the U23 quota system, as established by the Belgian Competition Authority', cites La Dernière Heure/Les Sports Gevart. Olympic Charleroi stood almost the entire season on the last place and ended there too, but wants to stay in the Challenger Pro League despite this. The club demands the following for the upcoming meeting on June 10. Annulment of the consequences of an illegal competition. 'The annulment of all consequences of the illegal competition; the preservation in D1B of all teams with a D1B license; and the regularization of the situation before the start of the 2026-2027 season', cites DH Olympic Charleroi. If no satisfactory answer is received during this meeting, the club is prepared to take immediate legal action at the competent courts, including a court order or a procedure at the ABC, with sanctions in case of non-compliance if necessary. This position is shared by several clubs, including some that play in lower divisions, who are directly affected by the consequences of this illegal system', according to the demand of Olympic Charleroi. Olympic Charleroi chooses to approach the KBVB and not the Pro League. According to them, the KBVB has deliberately chosen to maintain the existing quota for the U23. This system was abolished in favor of the new format, with which the unfairness according to Charleroi is recognized. Olympic Charleroi disputes the relegation and states that the entire competition took place under irregular circumstances.