Wheee I want to go home and start taking screenshots right now - except I still have two hours at work and it's maintenance time so that's not even possible!

Question: If I enter as a participant this round but am not chosen, would I be permitted to try out as a judge later on? (If not, I'll still be available as a pinch hit judge if someone has to leave unexpectedly.) Not sure of the etiquette or protocol around that.