(1) The limits of liability determined in accordance with section 421 shall apply to the aggregate of all claims which arise on any distinct occasion—
(a) against a shipowner and any person for whose act, neglect, omission or default the shipowner may be responsible; or
(b) against a shipowner rendering salvage services from that ship and a salvor operating from such ship and any person for whose act, neglect, omission or default the shipowner or salvor is responsible; or
(c) against a salvor who is not operating from a ship or who is operating solely on the ship to, or in respect of which, the salvage services are rendered and any person for whose act, neglect, omission or default the salvor is responsible.
(2) The limits of liability determined in accordance with section 425 shall apply to the aggregate of all claims subject to the liability which may arise on any distinct occasion against the shipowner and any person for whose act, neglect, omission or default the shipowner may be responsible.