A. After default, a secured party has the rights provided in this article and, except as otherwise provided in section 47-9602, those provided by agreement of the parties. A secured party:

1. 1. May reduce a claim to judgment, foreclose or otherwise enforce the claim, security interest or agricultural lien by any available judicial procedure; and
2. 2. If the collateral is documents, may proceed either as to the documents or as to the goods they cover.

E. If a secured party has reduced its claim to judgment, the lien of any levy that may be made on the collateral by virtue of an execution based on the judgment relates back to the earliest of:

1. 1. The date of perfection of the security interest or agricultural lien in the collateral;
2. 2. The date of filing a financing statement covering the collateral; or
3. 3. Any date specified in a statute under which the agricultural lien was created.