Vets will record heart rates, times in and out of the urtuus, and all other parameters on the riders' record cards, which will be carried by the riders at all times while mounted. These are a running record of the Derby and are very important documents. Do try not to lose them! And do try not to destroy them either; they are A5 size and love to be stored in plastic ziplock bags before being shoved in a pocket.
At the end of the race they are returned to the event director for our records and for showing to Guinness as we attempt to beat our own World Record for Longest Horse Race. In addition, any penalties served and yet to be served will be noted, as a cross check for the final placings, and a tool for the vets to see how you are riding the Derby.