In terms of the RAW file only.
Do we not then need to take it a step further back and dictate the in-camera settings. As saturation/contrast and sharpening can be adjusted there.
I have to say that I don't think that this would be a good idea. In the days of contests before the widespread advent of digital imaging (and even now), were people limited to a certain type of slide or print film (each with different characteristics, color tones, dynamic range, etc) that they were required to use?
If not, then why would you place a similar restriction on digital imaging? The amazing aspect of digital is the ability to soft-tweak a RAW file to achieve exactly the look (of the film, or 'not-film') you desire - if you so wished, you could simulate Afga or Ektachrome, or even go straight for Velvia's vivid saturated colors. Not only that, but I, for one, have to white balance nearly every shot out of my camera (especially in the local waters, where I end up with some oddly crazy 'auto' white balances).
If you begin to start limiting work in the RAW converter, what will be the standard for the limitations? I saw mention earlier in the thread about only allowing certain sliders - it seems the individual may have assumed everyone is using Adobe Camera RAW, when, in reality, that's typically not the case.
I agree with the necessity at some times of the RAW file for verification. At other times, contests should be able to rely on honesty and integrity. But to eliminate one of the strongest advantages of digital by clamping down on RAW conversion, well, that sounds a bit out of hand.
~Matt Segal