3. "Authoritative Copy" of Electronic Chattel Paper. One requirement for establishing control is that a particular copy be an "authoritative copy. " Although other copies may exist, they must be distinguished from the authoritative copy. This may be achieved, for example, through the methods of authentication that are used or by business practices involving the marking of any additional copies. When tangible chattel paper is converted to electronic chattel paper, in order to establish that a copy of the electronic chattel paper is the authoritative copy it may be necessary to show that the tangible chattel paper no longer exists or has been permanently marked to indicate that it is not the authoritative copy.

4. Development of Control Systems. This Article leaves to the marketplace the development of systems and procedures, through a combination of suitable technologies and business practices, for dealing with control of electronic chattel paper in a commercial context. However, achieving control under this section requires more than the agreement of interested persons that the elements of control are satisfied. For example, paragraph (4) [Maine cite paragraph (d)] contemplates that control requires that it be a physical impossibility (or sufficiently unlikely or implausible so as to approach practical impossibility) to add or change an identified assignee without the participation of the secured party (or its authorized representative). It would not be enough for the assignor merely to agree that it will not change the identified assignee without the assignee-secured party's consent. However, the standards applied to determine whether a party is in control of electronic chattel paper should not be more stringent than the standards now applied to determine whether a party is in possession of tangible