We are crewing department of JUTHA MARITIME PUBLIC CO.LTD. in THAILAND and would you please advise us the our chief engineer have valid Certificate of Authorization of RINA no.2012 XI 01 42 and Owner / Manager: NORDANA SHIPPING (SINGAPORE) PTE LTD. And he had been changed the vessel with new owner is NPC I (SINGAPORE) PTE LTD. And he can using the Certificate or should be renew once again.