Which waiver does an out-of-state subcontractor need to sign

We are a general contractor in Georgia, but we do business in other states. If I have a subcontractor who resides in Missouri (which has its own lien waiver forms) who works on a job in Illinois (which does not have its own lien waiver forms), do I need to ask that subcontractor to sign a Missouri lien waiver or a Georgia lien waiver? Is it based on where the job is located? Thank you.