http://www.freedomrider.com/bridleFR4.html
Looped or sliding clip-on attachments.
From EC website;
http://www.equinecanada.ca/para-equestrian/index.php?option=com_content&task=category&id=24&Itemid=468
Compensatory Aids
What are compensatory aids?
Usually these aids manage reins or help a rider maintain his or her seat, though there is a broad range in function depending on the rider’s ability. This specialized equipment, sometimes known as adaptive tack, can be the difference for a rider with a disability in levelling the competitive playing field. While compensatory aids are varied and can be unique to a Para-rider, they should never provide an advantage to the athlete.
How does an aid get approved nationally?
Aids will be approved during the classification process, after which a rider will receive a classification card stating their profile, grade and approved adaptive equipment. Using this card, a rider with a disability can compete in dressage competitions with their adaptive equipment.
How does an aid get approved internationally?
Para-riders can compete in able-bodied FEI dressage competitions using FEI-approved compensatory aids. The aids should correlate to the rider’s degree of disability, as defined by the International Paralympic Equestrian Committee (IPEC).
Applications for an FEI-approved compensatory aid must be made by Equine Canada on behalf of the rider. They need to be accompanied by an FEI (IPEC) classification card, and a letter from Equine Canada stating that the rider can compete in able-bodied competitions at a national level. Applications must reach the FEI before December 31st of the year before the dressage competition.
At this time, only dressage and driving have international rules and guidelines for use of adaptive equipment. Jumping is also beginning to emerge as an international discipline in a few European countries at this time. For the developing disciplines, as long as they are safe and enhance the person’s ability to perform, innovative use of adaptive equipment is encouraged.