IMEHA (International Model Equine Hobbyists Association) was an online photo showing site that existing until 2018. Included on the site were these guidebooks for judging and showing model horses in Performance classes. MEPSA has obtained permission to share the info contained in the guides.
FEI Prix St. Georges, FEI Intermediate I and II, FEI Grand Prix
Haute Ecole or High School Movements:
Prix St. Georges Level
The Prix St. Georges level introduces the movements of half pirouette at canter, 8 meter trot and canter circles, additional work on flying changes and extended gaits. Collection, balance, self carriage, impulsion and the “up hill” work will improve during work at this level. This level prepares the team for more complex movements of Intermediate.
 Transition from Collected Walk to Collected Trot |  Collected Canter |  Extended Trot |
Intermediate Level I and II
Training at Intermediate Level I and II will teach the pair the multiple (3) half pass at canter incorporating flying changes of lead, the full pirouette at canter and an overall improvement in elasticity, collection, quality and smoothness of the transitions, self carriage, impulsion and improve the strength yet again of the ability of the hind quarters to carry additional weight and deliver power. The pair will also learn to complete flying changes of lead every third and every other stride. The accuracy, placement and precision of each movement improves at these two levels along with the correct bend, flexion, submission, suppleness and obedience to the aids. The Intermediate Level II test introduces the new movements of “passage” (an elevated, animated trot that calls for additional flexion of the hocks and knees as well as additional raising of the limbs) and the “piaffe” (trot in place) though some forward movement is acceptable at this level for this movement. Performing the piaffe at this level calls for 5 steps and the passage is limited in length as this is the introduction level for these movements. The paces must be very regular, rhythmic show cadence and straightness and self carriage. The piaffe requires that a certain height of lift of the “up” legs must be reached to be counted as completion of the movement. In order to attain good scores the up leg must lift higher than the cornet band of the opposite limb. The extended gaits of walk, trot and canter must show that the horse is “over tracking” (placement of the hind hoof is in front of the past footfall of the corresponding front) by a large distance, typically a foot or even more. Inadequate “thoroughness” from the hind quarters will cost the pair dearly in scores if not achieved. Harmony and lightness are further developed at these levels.
 Correct Half Pass Right |  Extended Canter (except head should be straight) |  Passage (photo by Andrea Robbins) |  Collected Trot |  Piaffe |
To see the “piaffe” in motion go to: http://en.wikipedia.org/wiki/Piaffe
The Grand Prix and the Grand Prix Special
This, the highest level of competition Dressage is called the Grand Prix, each movement will reach the maximum FEI requirements for quantity and quality. This is the pinnacle of dressage competition. The requirement of 12 to 15 steps of piaffe is introduced along with longer selections of passage, more precise canter pirouettes, changes of lead every other (9) and every stride (15) are also required. The difficulty of the transitions between movements has increased to its maximum level; Halt to collected canter, passage to piaffe and back to passage, then to extended trot. The movements of collected canter to canter pirouette then back to collected canter transitions are all heavily weighted at this level. Half pass at trot and canter are more demanding and longer with multiple changes in direction with flying lead changes at each change of direction make this level extremely demanding of both horse and rider. Self carriage, cadence and quality of all movements reaches its highest competition level. An unprepared pairing will find only frustration at this level. The pair must be relaxed and confident in their work, signals and aids from the rider become invisible at this level.
 Half Pass Right |  Passage (though head it is straight) |  Canter Pirouette Left (Not quite on the bit) |
 Correct Passage Photo by Christina Brown, CK Tiny Tack |  Correct Piaffe |  Correct Passage |
Upper levels, FEI Prix St. Georges, FEI Intermediate I and II, FEI Grand Prix Entry Requirements:
Required Tack:
A Dressage saddle is required. A Double Bridle with bridoon and curb with curb chain, and cavesson noseband (may be padded) is required.
Optional Equipment:
White or conservative-color Saddle pads
Prohibited Equipment:
Pelham bits, snaffle bridle, breastplate or crupper, martingales, bit guards, boots or bandages, blinkers, or other gadgets are strictly forbidden, under penalty of elimination. A whip is prohibited.
Rider Attire:
The dress code is Shadbelly, tail coat of black or dark blue color, with tie, choker or stock tie white, off-white, or same color as coat, white or light-colored breeches, black riding boots, and a Top Hat that is black or the same color as the coat. Men may also wear a short coat with a bowler hat. Gloves of white, off-white or same color as the coat are required. Spurs without rowels are mandatory.
Members of the Armed Services and police units may ride in the uniform of their service at any level. Riders choosing to wear Armed Services or police uniform must wear the appropriate military/police cap or hat for their branch of service, or protective headgear.
Entry Requirements:
A dressage arena (indoor or outdoor) and visible letter.
A description of the test and movement.
DRESSAGE ENTRANTS PLEASE NOTE:
The above list of Tack and Attire requirements is merely a simplified version.
FOR COMPLETE RULES, DETAILS AND SPECIFICS please see Dressage Main Page, Dressage Overview,
Dressage – the Value of Knowledge, the USEF Dressage Rulebook, FEI Rulebook and the USDF Rulebook listed above in the top menu.
TEST PORTIONS WHICH INVOLVE ENTERING, EXITING, OR HALT/ SALUTE THE JUDGE:
Are to be shown ONLY in Dressage All Others, Awards, Horse Entering, Horse Exiting Arena, etc.