B. As long as and to the extent that an issuer or nominated person has not been reimbursed or has not otherwise recovered the value given with respect to a security interest in a document under subsection A of this section, the security interest continues and is subject to chapter 9 of this title, but:

1. 1. A security agreement is not necessary to make the security interest enforceable under section 47-9203, subsection B, paragraph 3;
2. 2. If the document is presented in a medium other than a written or other tangible medium, the security interest is perfected; and
3. 3. If the document is presented in a written or other tangible medium and is not a certificated security, chattel paper, a document of title, an instrument or a letter of credit, the security interest is perfected and has priority over conflicting security interest in the document as long as the debtor does not have possession of the document.