Subject to section 3779(b) of this title and to subsection (b) of this section, the Commission shall promptly adjust and pay damages for injuries to vessels, or to the cargo, crew, or passengers of vessels, which may arise by reason of their passage through the locks of the Panama Canal when the injury was proximately caused by negligence or fault on the part of an officer or employee of the United States acting within the scope of his employment and in the line of his duties in connection with the operation of the Canal. If the negligence or fault of the vessel, master, crew, or passengers proximately contributed to the injury, the award of damages shall be diminished in proportion to the negligence or fault attributable to the vessel, master, crew, or passengers. Damages may not be allowed and paid for injuries to any protrusion beyond any portion of the hull of a vessel, whether it is permanent or temporary in character. A vessel is considered to be passing through the locks of the Canal, under the control of officers or employees of the United States, from the time the first towing line is made fast on board before entrance into the locks and until the towing lines are cast off upon, or immediately prior to, departure from the lock chamber. No payment for damages on a claim may be made under this section unless the claim is filed with the Commission within one year after the date of the injury or by November 18, 1998, whichever is later.