Md. Code, Public Utilities § 10–206

(a) Each taxicab for which a permit is required shall have the word “taxicab” appear conspicuously on the taxicab.

(b) (1) The Commission shall:

(i) determine the form and style of a badge; and

(ii) issue to each licensed taxicab driver a badge with the taxicab driver’s license number on the badge.

(2) A licensed taxicab driver shall display the badge conspicuously in the interior of a taxicab whenever operating the taxicab.