Frank Kemperman, chairman of the managing board of the Aachen-Laurensberger Rennverein e.V. (ALRV) said this week: "The FEI's decision is a contradiction to our ideal of the sport."
Kemperman, as chairman of the FEI's Dressage Committee, was in Copenhagen last week for the General Assembly and vehemently fought against the new regulations.
During the meeting the FEI decided to permit several substances for the treatment of horses shortly before or during an event.
On Monday CHIO Aachen organisers said that in the future, the event will continue its straightforward strategy for fair and clean sport.
They are backed by the results of a survey in July, in which event visitors were interviewed by representatives of the German University of Sport, Cologne. The survey showed that 89 per cent of the visitors are convinced that the CHIO-organisers are exhausting all their options in the fight against doping.
Deutsche Bank General Manager Michael Mronz said: "We do not want to have unsound or injured horses in our sport. The CHIO Aachen 2010 will not be carried out on the basis of the current FEI regulations, but according to the ethics of clean sport."
The Deutsche Bank, which has been supporting the event for 52 years, has extended its contract with the festival CHIO Aachen for another three years. The bank is also traditional partner and title sponsor of the Deutsche Bank Prize, the dressage competition with the highest prize money in the world.