I was on an FAA check ride once when the controller said expedite to 9,000 ft so said when I slowed to 250 I would descend because he had traffic crossing at 10,000 ft ahead of us. Using full speed brakes was able to descend about 5 miles later but told the FAA guy, only the administrator can authorize over 250 below 10, not ATC. Any other time I would have done it. We were in the clear so was just protecting my license. I hate it when you have to do stupid things because you have to stay legal.