"The FEI released the three diagrams that illustrate the permitted positions of the horse's head and neck during pre- and post- competition training. The new Annex (XIII), which has now been completed, was created by the Working Group that produced a revised FEI Stewards Manual on warm-up techniques for Dressage."
See: http://www.eurodressage.com/equestrian/2010/05/11/fei-publishes-diagrams-stewards-manual-warm-techniques
