source: Supplier will maintain  and reproduce upon Buyer's written request, relevant business and accounting records to support invoices under this Agreement and proof of required permits and professional licenses, for a period of time as required by local law, but not for less than three  years following completion or termination of the relevant SOW and/or WA.
target: Supplier will maintain and reproduce relevant business and accounting records to support invoices under this Agreement and proof of required permits and professional licenses.This is done upon Buyer's written request. This is done for a period of time as required by local law. The minimum time is  three years following completion or termination of the relevant SOW and/or WA.
references: Supplier will maintain and reproduce relevant business and accounting records to support invoices under this Agreement and proof of required permits and professional licenses.This is done upon Buyer's written request. This is done for a period of time as required by local law. The minimum time is  three years following completion or termination of the relevant SOW and/or WA.