PMSIs must be perfected by registration. There is no other way to perfect PMSIs. The rules that govern how PMSIs must be registered are called the PMSI Rules in this book.
The PMSI Rules1, which apply to all PMSIs, are that:
(a) perfection must be by registration;
(b) the registration must nominate that the security interest is a PMSI. This is the case even for security interests over all present and after- acquired property2;
(c) where the collateral is inventory the PMSI must be registered before the collateral is either supplied to the grantor (for inventory that is goods), or before the security interest attaches (for other inventory):
(d) where the collateral is equipment (not inventory), the PMSI must be registered within 15 business days of the secured party supplying goods to the grantor, or 15 business days of the security interest attaching for equipment other than goods.