Commanders may be used except for British Eventing tests.
Salutes should be made with reins and whip (if carried) in one hand and the free hand lowered to the rider's side and the rider should nod their head. Gentlemen may remove and lower their hat with their free hand before nodding.
Trot sitting or rising (or a mixture of both) may be ridden in all British Dressage tests up to and including Elementary and all Pony Club tests.
Errors: When a competitor makes an error of course - takes the wrong turn, omits a movement, etc. 2 marks will be deducted. If the movement is not performed then a mark equal to the average of the collectives marks is given as well as deducting 2 for the error. If the competitor makes an error of test - trots rising instead of sitting or at the salute does not take the reins in one hand - he must be penalised for error. If 3 errors of course are made the competitor will be eliminated.
Further details pertaining to riding the test can be found in British Dressage Notes on Interpretation of Dressage Sheets in the BD Rule Book 2011 (pages 51-2).