source: Supplier will maintain  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 seven  years from the date on which the corresponding Service is completed.
target: Supplier will maintain relevant business and accounting records to support invoices under this Agreement. Supplier will maintain proof of required permits and professional licenses. These records need to be maintained for a period of time as required by local law. Seven years is the minimum. The data is counted from when the corresponding Service is completed.
references: Supplier will maintain relevant business and accounting records to support invoices under this Agreement. Supplier will maintain proof of required permits and professional licenses. These records need to be maintained for a period of time as required by local law. Seven years is the minimum. The data is counted from when the corresponding Service is completed.