(4) With regard to the personal data collected, processed or used by Supplier for the performance of this Purchase Order, Supplier shall periodically verify and record the status of the related preservation and security safeguarding measures implemented by Supplier and shall, under Buyer’s instruction, submit the relevant documents to Buyer for its review. Supplier further agrees that Buyer is entitled to visit Supplier’s operation premises and facilities to conduct an appropriate audit and investigation on the preservation and security safeguarding measures of the personal data implemented by Supplier.