Who must ensure that ownership information is correct on registration papers?

The correct answer is that the trainer must ensure that ownership information is correct on registration papers. This is a critical responsibility because the trainer acts as the intermediary between the owner and the racing authority, managing various aspects of the horse's racing career. Having accurate ownership information is essential for entry into races, accountability, and maintaining integrity within the sport.

While the horse's owner is responsible for providing the correct information initially, the trainer must verify its accuracy throughout the horse’s racing career to avoid any potential confusion or disputes. The racing secretary and the Board of Stewards play roles in the administration of races and adherence to rules, but it is the trainer's direct duty to ensure the registration papers reflect correct ownership details before races occur.