She can change sponsors in the middle of the ride,
providing the ride management on site at that point is notified and they
approve. It's been done a lot.
My daughter will be riding the LD headwaters ride with my
husband and I and we were wondering what would happen to Emily if say my
husband RO or was pulled and I wasn't with them ( I may ride ahead or be
riding the 50 ) does she have to quit also? or can she just ask for
another sponsor ?