(a) Perfection by filing permitted. — A security interest in chattel paper, negotiable documents, instruments, or investment property may be perfected by filing.
(b) Control or possession of certain collateral. — Except as otherwise provided in Section 9-315(c) and (d) for proceeds:
(1) a security interest in a deposit account may be perfected only by control under Section 9-314;
(2) and except as otherwise provided in Section 9-308(d), a security interest in a letter-of-credit right may be perfected only by control under Section 9-314; and
(3) a security interest in money may be perfected only by the secured party's taking possession under Section 9-313.
(c) Goods covered by negotiable document. — While goods are in the possession of a bailee that has issued a negotiable document covering the goods:
(1) a security interest in the goods may be perfected by perfecting a security interest in the document; and
(2) a security interest perfected in the document has priority over any security interest that becomes perfected in the goods by another method during that time.
(d) Goods covered by nonnegotiable document. — While goods are in the possession of a bailee that has issued a nonnegotiable document covering the goods, a security interest in the goods may be perfected by:
(1) issuance of a document in the name of the secured party;
(2) the bailee's receipt of notification of the secured party's interest; or
(3) filing as to the goods.
(e) Temporary perfection:
(f) Temporary perfection:
(1) ultimate sale or exchange; or
(2) loading, unloading, storing, shipping, transshipping, manufacturing, processing, or otherwise dealing with them in a manner preliminary to their sale or exchange.
(g) Temporary perfection:
(1) ultimate sale or exchange; or
(2) presentation, collection, enforcement, renewal, or registration of transfer.
(h) Expiration of temporary perfection. — After the 20-day period specified in subsection (e), (f), or (g) expires, perfection depends upon compliance with this Article.