The UNCITRAL Working Group on Electronic Communications decided that the ECC should not apply to negotiable instruments or documents of title (such as bills of lading), as special rules would be required to overcome difficulties of creating an electronic equivalent of paper-based negotiability.  A complete copy of Peter Jones’  article is entitled The United Nations Convention on the Use of Electronic Communications in International Contracts (ECC) - Part II - Transport Documents.  Also, please see Mr. Jones’ article on the United Nations Commission on Trade Law.