In the example, there appears to be a plausible business purpose for the use-of-funds covenant. However, a court may conclude that a covenant with no business purpose other than imposing an impediment to an assignment actually is a direct restriction that is rendered ineffective by subsection (d) [Maine cite subsection (4)].

6. Legal Restrictions on Assignment. Former Section 9- 318(4), like subsection (d) [Maine cite subsection (4)] of this section, addressed only contractual restrictions on assignment. The former section was grounded on the reality that legal, as opposed to contractual, restrictions on assignments of rights to payment had largely disappeared. New subsection (f) [Maine cite subsection (6)] codifies this principle of free assignability for accounts and chattel paper. For the most part the discussion of contractual restrictions in Comment 5 applies as well to legal restrictions rendered ineffective under subsection (f) [Maine cite subsection (6)].

7. Multiple Assignments. This section, like former Section 9-318, is not a complete codification of the law of assignments of rights to payment. In particular, it is silent concerning many of the ramifications for an account debtor in cases of multiple assignments of the same right. For example, an assignor might assign the same receivable to multiple assignees (which assignments could be either inadvertent or wrongful). Or, the assignor could assign the receivable to assignee-1, which then might re-assign it to assignee-2, and so forth. The rights and duties of an account debtor in the face of multiple assignments and in other circumstances not resolved in the statutory text are left to the common-law rules. See, e.g., Restatement (2d), Contracts §§ 338(3), 339. The failure of former Article 9 to codify these rules does not appear to have caused problems.

8. Consumer Account Debtors. Subsection (h) [Maine cite subsection (8)] is new. It makes clear that the rules of this section are subject to other law establishing special rules for consumer account debtors.

9. Account Debtors on Health-Care-Insurance Receivables. Subsection (i) [Maine cite subsection (9)] also is new. The obligation of an insurer with respect to a health-care-insurance receivable is governed by other law. Section 9-408 [Maine cite section 9-1408] addresses contractual and legal restrictions on the assignment of a health-care-insurance receivable.