Subject to article 19, the assignor, the assignee and the debtor may derogate from or vary by agreement provisions of this Convention relating to their respective rights and obligations. Such an agreement does not affect the rights of any person who is not a party to the agreement.
在不违反第19条的情况下，转让人、受让人和债务人可通过协议（删减或更改）本公约对其各自权利和义务的规定。此类协议不影响非协议当事方的任何人的权利。