Md. Code Ann., State Gov't § 20-501

An owner or operator of commercial property, an agent or employee of the owner or operator of commercial property, or a person that is licensed or regulated by the State may not discriminate against an individual in the terms, conditions, or privileges of the leasing of property for commercial use, or in the provision of services or facilities in connection with the leasing of property for commercial use, because of the individual’s race, color, religion, sex, age, disability, marital status, sexual orientation, gender identity, or national origin.