What is one of the key requirements for bareback bronc riding?

In bareback bronc riding, a key requirement is that the rider must remain on the bronc for a full 8 seconds. This duration is specific to the discipline of bareback riding and is essential for a valid ride to be scored. The 8-second rule is a standard in rodeo events as it tests the rider's skill, balance, and ability to control their position on the horse while being bucked off. The score, which is often determined based on the performance of both the rider and the horse, is only valid if the rider maintains their grip and balance for the entire 8 seconds.

The other choices do not accurately represent the requirements of bareback bronc riding. For instance, while scoring over 80 points can be a good benchmark for an exceptional performance, it is not a required condition to qualify the ride. Both the duration of staying on for 6 seconds and wearing sharp spurs are not relevant to bareback riding, as the standard duration is specifically 8 seconds, and spurs are typically required to be dull for safety reasons. Thus, understanding the importance of the 8-second rule is crucial for anyone engaging in or studying the sport of bareback bronc riding.