California Code, Commercial Code - COM § 9311

(a) Except as otherwise provided in subdivision (d), the filing of a financing statement is not necessary or effective to perfect a security interest in property subject to any of the following:

(b) Compliance with the requirements of a statute, regulation, or treaty described in subdivision (a) for obtaining priority over the rights of a lien creditor is equivalent to the filing of a financing statement under this division.  Except as otherwise provided in subdivision (d), in Section 9313, and in subdivisions (d) and (e) of Section 9316 for goods covered by a certificate of title, a security interest in property subject to a statute, regulation, or treaty described in subdivision (a) may be perfected only by compliance with those requirements, and a security interest so perfected remains perfected notwithstanding a change in the use or transfer of possession of the collateral.

(c) Except as otherwise provided in subdivision (d) and in subdivisions (d) and (e) of Section 9316, duration and renewal of perfection of a security interest perfected by compliance with the requirements prescribed by a statute, regulation, or treaty described in subdivision (a) are governed by the statute, regulation, or treaty.  In other respects, the security interest is subject to this division.

(d) During any period in which collateral subject to a statute specified in paragraph (2) of subdivision (a) is inventory held for sale or lease by a person or leased by that person as lessor and that person is in the business of selling goods of that kind, this section does not apply to a security interest in that collateral created by that person.