Ariz. Rev. Stat. § 47-9207
B. Except as otherwise provided in subsection D of this section, if a secured party has possession of collateral:
4. The secured party may use or operate the collateral:
C. Except as otherwise provided in subsection D of this section, a secured party having possession of collateral or control of collateral under section 47-7106, 47-9104, 47-9105, 47-9106 or 47-9107:
D. If the secured party is a buyer of accounts, chattel paper, payment intangibles or promissory notes or a consignor:
1. Subsection A of this section does not apply unless the secured party is entitled under an agreement: