Part IV. Performance of Lease Contract: Repudiated, Substituted, and Excused. § 28:2A–401. Insecurity: adequate assurance of performance. § 28:2A–402. Anticipatory repudiation. § 28:2A–403. Retraction of anticipatory repudiation. § 28:2A–404. Substituted performance. § 28:2A–405. Excused performance. § 28:2A–406. Procedure on excused performance. § 28:2A–407. Irrevocable promises: finance leases.