Part IV. Rights of Third Parties. § 28:9–401. Alienability of debtor’s rights. § 28:9–402. Secured party not obligated on contract of debtor or in tort. § 28:9–403. Agreement not to assert defenses against assignee. § 28:9–404. Rights acquired by assignee; claims and defenses against assignee. § 28:9–405. Modification of assigned contract. § 28:9–406. Discharge of account debtor; notification of assignment; identification and proof of assignment; restrictions on assignment of accounts, chattel paper, payment intangibles, and promissory notes ineffective. § 28:9–407. Restrictions on creation or enforcement of security interest in leasehold interest or in lessor’s residual interest. § 28:9–408. Restrictions on assignment of promissory notes, health-care-insurance receivables, and certain general intangibles ineffective. § 28:9–409. Restrictions on assignment of letter-of-credit rights ineffective.