(b) Except to the extent otherwise agreed by its entitlement holder, a securities intermediary may not grant any security interests in a financial asset it is obligated to maintain pursuant to subsection (a) of this section.
(c) A securities intermediary satisfies the duty in subsection (a) of this section if:
(1) The securities intermediary acts with respect to the duty as agreed upon by the entitlement holder and the securities intermediary; or
(2) In the absence of agreement, the securities intermediary exercises due care in accordance with reasonable commercial standards to obtain and maintain the financial asset.
(d) This section does not apply to a clearing corporation that is itself the obligor of an option or similar obligation to which its entitlement holders have security entitlements.