Apparently, my BO is fine with family members riding your horse. However, anyone else is not allowed to ride your horse, even if you're present and they sign the waiver. So, for example, my mother or husband could ride my horse, but a friend cannot. Even another person boarding at that barn is not allowed.
This isn't a huge issue for me at the moment as I don't want anyone else riding my horse until he's had a bit more training and experience. However, at some point this will become a problem, particularly because I would like a girl I know to show him in youth hunter and eq classes eventually. And clearly she will need to ride him for that to happen.
So have you seen this before? I'm just curious. I totally understand not letting others ride your horse if you're not present--in fact, if this happened I would be furious. But if I'm there and proper waivers are signed... I don't see the issue.