Un-check a box if it fulfills a condition?
Situation: I have a grid where a user enters in the number of tables they would need for an upcoming event. In the grid, I have a "submit for approval" checkbox for the user to check once they have entered their table demand unit. Then it goes to the Admin to either approve, reject or "put on hold." If it is put on hold, I want the ability for the box to become unchecked for the user so that he can change his demand (usually meaning he has to decrease his unit ask) and then recheck the box to resubmit. I'm curious as to how to accomplish this.