Maryland Statutes
Subtitle 3 - Commercial Real Estate Broker's Lien
Section 14-311 - Waivers

(a)    A commercial leasing brokerage agreement between a broker and an owner may not waive or require the broker to waive the right to claim or establish a broker’s lien.
    (b)    Any waiver provision made in a commercial leasing brokerage agreement or any other contract, express or implied, between a broker and an owner made in violation of this section is void as a matter of public policy.