From the American Horse Show Association rulebook 2001: CHAPTER XVII. MOUNTED NATIVE COSTUME.

Article 1670. General.
1. Rider must have complete control of horse at all times.
2. Competitors enter the ring in a counterclockwise direction at the canter.
3. Judges are required to consider all gaits equally in adjudicating this class.
4. It is suggested that horses line up head-to-tail the length of ring.

Article 1671. Appointments.
1. Bridle may consist of bit, hackamore or other suitable headstall. Safety is of the utmost importance in tack and attire. Decorations in keeping with colorful desert regalia shall be added to equipment.
2. No martingales or tie downs permitted.
3. Attire shall consist of native (Bedouin) type costume including flowing cape or coat, pantaloons, head dress, scarf or sash. No object may be carried in either or both hands other than reins, a portion of an aba, and/or a riding crop or whip. Protective headgear may be worn without penalty. (See General Rules, Art. 318)
4. Spurs, whip or crop optional, at the exhibitor's discretion.

Article 1672. Qualifying Gaits.
Extreme or reckless speed to be penalized. For description of gaits, see Art. 1621.

Article 1673. Arabian Mounted Native Costume Class Specifications.
1. OPEN, MAIDEN, NOVICE, LIMIT, STALLIONS, MARES, GELDINGS, ATR, JTR, AOTR, AAOTR, JOTR. To be shown at a walk, canter and hand gallop; extreme or reckless speed to be penalized. Horses shall stand quietly and back readily. To be judged 75% on performance and manners; 25% on appointments.
2. CHAMPIONSHIP. To be eligible, horse must have been entered, shown and judged in a designated qualifying class in the Arabian Native Costume section. To be shown at a walk, canter and hand gallop; extreme or reckless speed to be penalized. Horses shall stand quietly and back readily. To be judged 75% on performance and manners; 25% on appointments.