State Farm Insurance Company (in Illinois) considered my daughter to be a student, therefore, she was allowed to stay on our policy for the duration of the CP. During the time of the CP, she also maintained her permanent home address as ours and the car was titled in our name. She began a Management Internship when she completed the CP and State Farm allowed her to remain on our policy but I don't think they liked doing it that way because she was no longer in the Disney Housing. As soon as she finished the MI and began working full-time for WDW, State Farm could not cover her. She established residency in Florida, got her DL, registered her car in her own name, and obtained insurance through State Farm on her own policy.
I guess the key points are that she was a student AND the car was not titled to her. She did have to provide proof of insurance when she checked in for the CP. She got a letter from State Farm. We were told that the insurance card you normally carry was not sufficient -- it had to be a letter from the carrier. I contacted the agent and it was easy to arrange but don't wait until the last minute to get it!
Lynda