Md. Code, Business Regulation § 8–315

(a) Except as otherwise provided in subsection (b) of this section, a contractor may not pay or otherwise compensate another person for performing or selling a home improvement unless:

(1) the person to be paid or compensated is licensed;

(2) the person to be paid or compensated is not subject to the licensing requirements of this title; or

(3) the transaction for which the consideration is to be paid is not subject to this title.

(b) After the expiration, suspension, or revocation of a license, a person:

(1) is not relieved of outstanding obligations; and

(2) may complete and be paid under a home improvement contract that is made but not performed on the date of the expiration, suspension, or revocation.