(a) [Effect of modification on assignee.]
A modification of or substitution for an assigned contract is effective against an assignee if made in good faith . The assignee acquires corresponding rights under the modified or substituted contract. The assignment may provide that the modification or substitution is a breach of contract by the assignor. This subsection is subject to subsections (b) through (d).
(b) [Applicability of subsection (a).]
Subsection (a) applies to the extent that:
(1) the right to payment or a part thereof under an assigned contract has not been fully earned by performance; or
(2) the right to payment or a part thereof has been fully earned by performance and the account debtor has not received notification of the assignment under Section 9-406(a) .
(c) [Rule for individual under other law.]
This section is subject to law other than this article which establishes a different rule for an account debtor who is an individual and who incurred the obligation primarily for personal, family, or household purposes.
(d) [Inapplicability to health-care-insurance receivable.]
This section does not apply to an assignment of a health-care-insurance receivable .