Here again is what the 2007 Supplement says:
Western Country Pleasure Driving (Required at Nationals Only and will be consider Non-Rated at all other AMHR/ASPC Sanctioned Shows until the 2008 season.
1. A WCPD horse should carry himslef in a natural balanced postion with a relaxed head and neck. His poll should be level with, or slightly abouve the level of the withers.
2. Maximum credit should be give to a horse with a relaxed head and neck, that carries his poll level with, or slightly above the withers, moves straight, with low strides and with little flexion of the knees and hocks, with free movement, manner and a b right expression.
3. The horse shall be severly penalized if his poll is more the 5" above the level of the withers, is behind the vertical, is overflexed, excessively nosed out, the poll is below the level of the withers, exhibits excessive speed or shows lack of control by the exhibitor.
4. This class will be judged 60% on the horse's performance, manners and way of going, and suitability for assuring a pleasurable drive, 30% on condition, fit and appropriateness of harness and vehicle adn 10% on neatness, appropriateness of attire and overall impression. Overchecks and side checks should be slightly loose, not snug. Excessive knee action and speed to be penalized
5. The WCPD horse may not cross enter into the country pleasure, pleasure driving, or Park Harness classes.
Hope this helps.