(a) Except as otherwise provided in subsection (b) and section 400.9-312(b), a financing statement must be filed to perfect all security interests and agricultural liens.

(b) The filing of a financing statement is not necessary to perfect a security interest:

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(1) That is perfected under section 400.9-308(c), (d), (e) or (f);

(2) That is perfected under section 400.9-309 when it attaches;

(3) In property subject to a statute, regulation, or treaty described in section 400.9-311(a);

(4) In goods in possession of a bailee which is perfected under section 400.9-312(d)(1) or (2);

(5) In certificated securities, documents, goods, or instruments which is perfected without filing or possession under section 400.9-312(e), (f), or (g);

(6) In collateral in the secured party’s possession under section 400.9-313;

(7) In a certificated security which is perfected by delivery of the security certificate to the secured party under section 400.9-313;

(8) In deposit accounts, electronic chattel paper, investment property, or letter-of-credit rights which is perfected by control under section 400.9-314;

(9) In proceeds which is perfected under section 400.9-315; or

(10) That is perfected under section 400.9-316.

(c) 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.