Arabian Horse Association
Dilute Colour Association
Draft Breed Registry
Dressage Association
Driving Association
Endurance And Competitive Trail Riding Association
English Horse Association
Equine World Approval Society
Eventing Association
Gypsy Vanner Association
Holsteiner Registry
Morgan Horse Registry
Paint Horse Association
Performance Testing Association
Quarter Horse Association
Show Jumping Association
Stud Approval/Brood Approval Association
Thoroughbred Horse Association
Warmblood Registry
Western Horse Association
World Racing Association