(1). Except as otherwise provided in subsection (2) and section 9‑1312, subsection (2), a financing statement must be filed to perfect all security interests and agricultural liens.
(2). The filing of a financing statement is not necessary to perfect a security interest:
(a). That is perfected under section 9‑1308, subsection (4), (5), (6) or (7);
(b). That is perfected under section 9‑1309 when it attaches;
(c). In property subject to a statute, regulation or treaty described in section 9‑1311, subsection (1);
(d). In goods in possession of a bailee that is perfected under section 9‑1312, subsection (4), paragraph (a) or (b);
(e). In certificated securities, documents, goods or instruments that is perfected without filing, control or possession under section 9‑1312, subsection (5), (6) or (7);
(f). In collateral in the secured party's possession under section 9‑1313;
(g). In a certificated security that is perfected by delivery of the security certificate to the secured party under section 9‑1313;
(h). In controllable accounts, controllable electronic records, controllable payment intangibles, deposit accounts, electronic documents, investment property or letter-of-credit rights that is perfected by control under section 9‑1314;
(h-1). In chattel paper that is perfected by possession and control under section 9‑1314‑A;
(i). In proceeds that is perfected under section 9‑1315; or
(j). That is perfected under section 9‑1316.
(3). If a secured party assigns a perfected security interest or agricultural lien, a filing under this Article is not required to continue the perfected status of the security interest against creditors of and transferees from the original debtor.