(a) Rights under articles three, seven and eight not limited. This article does not limit the rights of a holder in due course of a negotiable instrument, a holder to which a negotiable document of title has been duly negotiated or a protected purchaser of a security. These holders or purchasers take priority over an earlier security interest, even if perfected, to the extent provided in articles three, seven and eight.
(b) Protection under article eight. This article does not limit the rights of or impose liability on a person to the extent that the person is protected against the assertion of a claim under article eight.
(c) Filing not notice. Filing under this article does not constitute notice of a claim or defense to the holders, or purchasers, or persons described in subsections (a) and (b) of this section.