Methods of custody and redelivery of securities, and conditions for early redelivery.

四、证券之保管、式及提前条件。

What this shows is that the purpose of the provision of timely redelivery in the charterparty is to enable the ship to be at the full disposal of the owners from the redelivery date.

这说明约中订立及时船条款使船舶自船日起完全处于船东处置之下。