I am working on a federal construction project and they have withheld 10% retainage and 0% is being withheld on them. Now they want to change our contract because we questioned it to: 0% retainage and $35,000 final acceptance. They are only being withheld $35,000 on them. We are working in state of GA. Can they hold the full $35,000 from us when that is all that is being held on them. We are a third tier subcontractor.