653. Circumstances preventing carriage or delivery.

When circumstances prevent the carriage of goods the carrier1 must decide whether it is preferable to carry the goods as a matter of course by modifying the route or whether it is advisable, in the interest of the person entitled, to ask him for instructions while giving him any relevant information available to the carrier2. If it is impossible to continue carrying the goods, the carrier must ask for instructions from the person who has the right to dispose of the goods, and if he is unable to obtain instructions within a reasonable time he must take such steps