Yes, reweighs are permitted only under the following conditions:
Same vehicle (tractor and trailer)
Reweigh must be from the same scale as the full-priced ticket (initial weigh)
Reweigh must be within 24 hours of the full-priced ticket.
Note that CAT Scale will charge for reweighs which will include the Comdata product code fee. Also, the steps to reweigh are the same as the initial weigh using the Weigh My Truck mobile app.