Village used to do the same thing, if a guest rocked up to a ride and didn't have a wristband from guest services and had a visible injury / disability we would send them to guest services. A staff member would then have a conversation with the guest, to determine the nature of it and then punch out holes for the rides they could not ride. If it was more complex a member of the health team would assess it.
Not sure if this is still the process, but I would assume it would be still the same or very similar. We did also use it for guests that were right on the minimum height for a ride, suggesting they go to GS to get measured and get a wristband to let the staff know what rides they were measured up for on the day to prevent them being re-measured every single time. Overall it was a great system, good for the guests and made it easier for the staff.