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

四、证券之保管、返还提前返还件。

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.

这说明约中订立的时还船的是使船舶自还船日起完全处于船东的处置之下。