Maryland Public Utility Companies Section 6-202

      (a)      The Commission may classify the public service companies under its jurisdiction.

      (b)      Two public service companies are of the same class, if they are both:

            (1)      common carrier companies;

            (2)      electric companies;

            (3)      gas companies;

            (4)      gas and electric companies;

            (5)      sewage disposal companies;

            (6)      telegraph companies;

            (7)      telephone companies; or

            (8)      water companies.