3. Nature of Debtor's Interest. Neither this section nor any other provision of this Article determines whether a debtor has a property interest. The definition of the term "security interest" provides that it is an "interest in personal property." See Section 1-201(37). Ordinarily, a debtor can create a security interest in collateral only if it has "rights in the collateral." See Section 9-203(b) [Maine cite section 9-1203, subsection (2)]. Other law determines whether a debtor has a property interest ("rights in the collateral") and the nature of that interest. For example, the nonexclusive license addressed in Example 1 may not create any property interest whatsoever in the intellectual property (e.g., copyright) that underlies the license and that effectively enables the licensor to grant the license. The debtor's property interest may be confined solely to its interest in the promises made by the licensor in the license agreement (e.g., a promise not to sue the debtor for its use of the software).

4. Scope: Sales of Payment Intangibles and Other General Intangibles; Assignments Unaffected by this Section. Subsections (a) and (c) [Maine cite subsections (1) and (3)] render ineffective restrictions on assignments only "to the extent" that the assignments restrict the "creation, attachment, or perfection of a security interest," including sales of payment intangibles and promissory notes. This section does not render ineffective a restriction on an assignment that does not create a security interest. For example, if the debtor in Comment 2, Example 1 purported to assign the license to another entity that would use the computer software itself, other law would govern the effectiveness of the anti-assignment provisions.