What is meant by payment term DA 60 days?

DA is a term used in import/export business internationally. DA stands for "Documents against Acceptance" and "number of Days" specified with DA means the number of days credit against that particular set of shipment documents(invoice, Shipping bill etc) i.e. DA 60 days means that importer/ purchaser will make payment within or at the latest by 60th day from the date of his acceptance of the Documents.