From what I can tell, it looks like they posted the entire spec. What's to stop someone from reproducing the signal on an alternate frequency? As far as I know, you can't rebroadcast the original, but if the original is gone, then it's not really rebroadcasting...
Makes me wonder if WWV will meet the same fate.
That's a shame. CHU is usually the first thing I look for when I turn on my shortwave radios (which I guess isn't all that often). Usually comes in a lot better than WWV in my area.