D.C. Code § 28:9-310: When filing required to perfect security interest or agricultural lien; security interests and agricultural liens to which filing provisions do not apply.

(a)

Except as otherwise provided in subsection (b) and § 28:9-312(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:

(1)

That is perfected under § 28:9-308(d), (e), (f), or (g);

(2)

That is perfected under § 28:9-309 when it attaches;

(3)

In property subject to a statute, regulation, or treaty described in § 28:9-311(a);

(4)

In goods in possession of a bailee which is perfected under § 28:9-312(d)(1) or (2);

(5)

In certificated securities, documents, goods, or instruments which is perfected without filing or possession under § 28:9-312(e), (f), or (g);

(6)

In collateral in the secured party’s possession under § 28:9-313;

(7)

In a certificated security which is perfected by delivery of the security certificate to the secured party under § 28:9-313;

(8)

In controllable accounts, controllable electronic records, controllable payment intangibles, deposit accounts, electronic documents, investment property, or letter-of-credit rights which is perfected by control under § 28:9-314;

(8A)

In chattel paper which is perfected by possession and control under § 28:9-314A;

(9)

In proceeds which is perfected under § 28:9-315; or

(10)

That is perfected under § 28:9-316.

(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.