Md. Code, Commercial Law § 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.