FEI has completely changed the FEI Para Equestrian tests effective January 1, 2017. The levels have been given new numbers with Levels I, II, III, IV, and V replacing Levels Ia, Ib, II, III, and IV. The rider physical requirement for each of the levels has not changed, only the Level numbers. The tests have been standardized to four tests - Preliminary, Team, Individual Championship, and Freestyle - per level. Levels I, II, and III are ridden in a 20x40 meter arena. Levels IV and V are ridden in a 40x60 meter arena.
Dressage Illustrated has rider test books, an Instructors test book, and Judges test book in stock and available for purchase