Maryland Code, Public Utilities § 25-303

(1) the charges for water and sanitary sewer connections to similar properties in developed areas may be based on the Commission's calculation, based on its experience, of an average cost for connections in both unimproved and developed areas; and

(2) the Commission may specify this connection charge as the uniform connection charge provided in § 25-301 of this subtitle for connections installed by the Commission in developed areas.