Time limits are good, but you have to take into consideration the whole beginner thing. Does this person belong to a club and have some coaching and advice or is he just walking in off the street? My very first contest was a revelation. I showed up, took my plane to the set up area, did my lines and stuff and stood around in a daze. I did fuel up and was waiting to see what was happening. It was announced that I was first up and I must have had the deer in the headlights look, because David Fitzgerald asked if I needed a launch. I had no idea who he was, but he seemed like a nice guy and I said yes. Anyhow, I crashed and David's kids both beat me. But, I did learn how a contest runs and it was a great learning experience for me but time limits were the last of my worries. So, my recommendation, for what it's worth, is to run the beginners off to the side by themselves so they can learn how to do it and not delay the big guys. If I had been first up on the main circle with the other classes looking at their watches wondering when I would get out of the way and let the real flyers get going, I probably would have just packed up and gone home, never to be seen again. There are people who don't belong to clubs because they are in the boonies. Give the beginners help, not rules.