Does the protocol mention the Stipes must be in attendance? They delegate other tasks such as issuing barrier certificates. A jockey riding a gallop can relay his/her thoughts to anyone. If that jockey thinks there's a problem the Stipe is on the end of a phone. Not sticking up for either side as I'm not sure of the exact wording of that protocol.
I don't think excuses should be made for not galloping prior to the races. Even tracks that don't have horses trained on site should source some for the exercise, like Tauherenikau does.