Section 554.9311 - Perfection of security interests in property subject to certain statutes, regulations, and treaties1.Security interest subject to other law. Except as otherwise provided in subsection 4, the filing of a financing statement is not necessary or effective to perfect a security interest in property subject to: a. a statute, regulation, or treaty of the United States whose requirements for a security interest's obtaining priority over the rights of a lien creditor with respect to the property preempt section 554.9310, subsection 1;b. any certificate-of-title statute, including as provided in chapter 321, covering automobiles, trailers, mobile homes, boats, farm tractors, or the like, which provides for a security interest to be indicated on a certificate of title as a condition or result of perfection; orc. a statute of another jurisdiction which provides for a security interest to be indicated on a certificate of title as a condition or result of the security interest's obtaining priority over the rights of a lien creditor with respect to the property.2.Compliance with other law. Compliance with the requirements of a statute, regulation, or treaty described in subsection 1 for obtaining priority over the rights of a lien creditor is equivalent to the filing of a financing statement under this Article. Except as otherwise provided in subsection 4 and sections 554.9313 and 554.9316, subsections 4 and 5, for goods covered by a certificate of title, a security interest in property subject to a statute, regulation, or treaty described in subsection 1 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.3.Duration and renewal of perfection. Except as otherwise provided in subsection 4 and section 554.9316, subsections 4 and 5, duration and renewal of perfection of a security interest perfected by compliance with the requirements prescribed by a statute, regulation, or treaty described in subsection 1 are governed by the statute, regulation, or treaty. In other respects, the security interest is subject to this Article.4.Inapplicability to certain inventory. During any period in which collateral subject to a statute specified in subsection 1, paragraph "b" 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.