That is one weird rule.
I'm like a lot of quilters - have a lot of works in progress that some of them take years to finish. (That's why I chose my forum name! Only an alien should have that many UFO's!)
I personally would not enter any quilts in a contest that had that rule. It's not like a car show where there is a diffinent year involved.
If they are going to have a rule like that, then they need a really good way of making sure it's followed. Like having them use a new line of fabric that didn't come out until 2008.
I'm glad you are not entering this contest. Makes you wonder how many have entered it that "bent" that rule!