A party may perform its contractual duties or exercise its contractual rights through a delegate or a subcontract unless: The contract prohibits delegation or subcontracting; or The other party has a substantial interest in having the original promisor perform or control the performance. Delegating or subcontracting performance does not relieve the delegating party of a duty to perform or of liability for breach. An attempted delegation that violates a term prohibiting delegation is not effective.