Md. Code, Public Utilities § 10–202

(a) A person must have a permit issued by the Commission whenever the person operates as a taxicab business in or from a point in Baltimore City, Baltimore County, the City of Cumberland, or the City of Hagerstown.

(b) The provisions of this division relating to taxicabs or of any public local law relating to taxicabs do not limit the jurisdiction of the Commission over a taxicab business as a common carrier even if the taxicab business operates in a jurisdiction other than Baltimore City, Baltimore County, the City of Cumberland, or the City of Hagerstown.