i would expect a horse to be well schooled and well mannered for showing, particularly if you are entering a class where the judge has to ride them. There has been a lot in H&H recently about judges being injured by bad mannered, badly behaved horses.
When i took my youngster to his first show (inhand M&M) one of the entrants got put straight to the bottom of the line coz his mare would not trot inhand. The judge was not impressed!
My princess, Bonnie, 28/7/06 loved and missed by us all
16.5 inch wintec 500, brown, immaculate and barely used complete with 3 gullets and synthetic leathers, £150 ono excl postage