Woah, looking at the comment time on your comment, I am so sorry. None of us saw it in the inbox until this morning--I thought it had just come in this morning, after prompts closed. I think we were all zombiefied from matching, but, I'm sorry we dropped the ball here :(

Prompt submission is now closed (and I just put up the prompt list), so, it's too late to answer your question, but in such cases it's usually allowed, although individual event rules are up to the particular event mods.