Article 9 7.

Where a ship is not at the port or anchorage where it is to be surveyed when the inventory certificate expires, the administration may, if it is proper to do so, extend the period of validity of the inventory certificate for a period not exceeding three months to enable the ship to complete its voyage to the port in which it is to be surveyed. Any such extension granted shall be conditional on the survey being completed at that port before the ship leaves. A ship to which an extension is granted shall not, on its arrival in the port in which it is to be surveyed, be entitled, by virtue of such extension, to leave the port without having a new certificate. When the renewal survey is completed, the new inventory certificate shall be valid for a period not exceeding five years from the date of expiry of the existing certificate before the extension was granted.