Email vendor: Who is the Importer on Record, and who pays the Customs charges?
If Vendor is Importer on Record, and vendor pays Customs. If UC is Importer on Record.
ACS is not needed. Issue Purchase Order without ANY shipping charges, and attach vendor's email to the PO.
1) Add ACS clause to the requisition, 2) Attach vendor's email to the requisition, 3) Enter a comment to the Dept re: Transit Insurance, and 4) Issue the PO.