Maryland Commercial Law Section 22-505

      (a)      A party may perform its contractual duties or exercise its contractual rights through a delegate or a subcontract unless:

            (1)      The contract prohibits delegation or subcontracting; or

            (2)      The other party has a substantial interest in having the original promisor perform or control the performance.

      (b)      Delegating or subcontracting performance does not relieve the delegating party of a duty to perform or of liability for breach.

      (c)      An attempted delegation that violates a term prohibiting delegation is not effective.