a guide for contest holders on what files they will need from the designers.

vector or raster images (logos vs websites)
RGB vs CMYK and what they need for their contest.
Dpi recommendations (if raster)

file recommendations for specific purposes e.g vector eps (illustrator 9 - 10) for logos.
layered PSD for websites
jpg, png or gif logos for websites and size recommendations.

Not all contest holders may know what files and specifications they may need to print their logo and to make sure that they get what they want then this guide should help them out.