Your right, they do limit goflers on the old course to below certain handicaps, for men its 24 or below and women its 36, you need to be able to prove your handicap with a certificate, and they will throw you off if you are hacking up the course. Although I've seen them throw people off the course in reality it doens't happen that often.
The limits used to be a lot lower but they've opened it up a little now.
More info can be found on the
Link's Trust Website
Happy golfing
Stuart.