No dog that has won a C.C. or any award that counts towards being a Champion may NOT enter matches.
Ahh this is one of my gripes. I have a Spanish Champion at home and he can't enter any matches limit shows but we don't have a championship level here so really his champion status stands for nothing.
A dog that I bred has recently become an Irish champion where there are usually only 2 or 3 of the breed at the show. We compete against higher numbers here in this country. We have our first breed club show a limit one next month and I was so looking forward to seeing the three sisters together as ones in Ireland, ones down souf and I own the other one but it's not to be.
I think the KC should have a ruling whereas rare breeds, imported breeds etc. should not be as strict on this ruling as it's a totally different kettle of fish than here for some of the champion status breeds in Ireland and abroad.