The USA also became the first nation other than Great Britain to win a Para Dressage Team event at a Paralympic Games.
It was a record-breaking 7th consecutive individual gold for Boyd Exell and the 12th Dutch team gold in Szilvásvárad, Hungary.
France grabbed the gold, while China and Malaysia secured spots on the podium - a historic first in the sport.
IEOC alleged that the FEI committed eight breaches of their MOU; the FEI Tribunal decision upheld only one.
The special meeting on Oct. 1 will include national federation reps, athletes, officials, organizers, trainers, and veterinary experts.
The Lipizzaner state stud farm at Szilvásvárad will be the venue; The Netherlands is favoured to win a 12th world title.
The Germans bounced back from their Olympic disappointment to win this fixture in Belgium over France and Great Britain.
Roberta Sheffield, Jody Schloss and Austen Burns will represent the maple leaf when para-dressage action gets underway September 3-7.
The German pipped Isabell Werth, who again had to settle for silver, this time with Wendy, while Lottie Fry took bronze with Glamourdale.
It was Germany's 15th Olympic team victory, but it happened by the narrowest of margins - just 0.121 percentage points.