First Tomato 'O The Season Contest Rules?
 

My friend is thinking of organizing a "First Tomato 'O The Season"
competition in my neighborhood. What kind of rules should he
establish? He's thinking of disallowing cherry tomatoes, as I believe
they ripen faster than regular tomatoes. Maybe judge the winner on
the first tomato that has grown to full size, come to full color, and
is edible? Any other considerations to determine the winner?

Thanks.