I know, that our subdistrict coming up, the kids were put into a weight class last week. The seeding meeting is this weekend. After the seeding meeting, there are no changes as far as I know. The kids can weigh in at Subs the night before and also the morning of the tourney. If the fail to make weight, they are out. If the can't make it Friday night, they can try again on Saturday morning, allowing them lose a couple pounds if they need to.
Then, the kids will have to make weight each week after at the District Championships, State Championships. If they miss any week, they are done. Correct me if I'm wrong anybody...