A vessel, aircraft, or radio station placed at the disposal of the Coast Guard for a specific period, shall be returned at the expiration of such period, unless circumstances or emergent need make the return impracticable at that time. The Commandant will determine the method, time, and documents to be exchanged upon the return to the owner of any facility. The property shall be reinventoried as of the time, date and place of redelivery, and mutually settled by the owner and the representative of the Coast Guard. Should the vessel have been accepted under emergent conditions, any claim for lost equipment or stores must be supported by invoices showing the date of purchase and the cost thereof by the person submitting claim therefor. The representative of the Coast Guard shall take all proper precautions to protect the interest of the owner as well as that of the United States.