if that is true(I havent ever seen such a thing), that's a stupid and ridiculous idea. the biggest thing a chief resdent does is use their knowledge of the workings of their program(as someone who has trained in it for 2 to 5 whole years) to get their job done. A chief resident who comes on the job not familar with their program would be a complete disaster. It would be the stupidest thing I have ever heard of.