Main Rule
The most important rule of them all was the simplest one. All people who are at Yellowstone National Park must keep their distance from animals at all times. There is no way someone can approach the animal with a guide next to him. In fact, there is a specific distance.
The distance of 25 yards as the minimum must be obeyed. What this means is that people are not allowed to come closer to the animals at any given point. The risk is too high. An animal can injure or even worse a tourist. Meanwhile, Lola saw something.