(a) In its utility operations, a public service company may not: (1) sell, render services, or furnish a commodity until the public service company files and publishes its rate schedules in accordance with § 4–202 of this title; or (2) demand or collect: (i) compensation that differs from compensation specified in its rate schedules that are in force at […]
In an action by a public service company to collect a charge, the public service company may not recover any amount if, in the transaction that is the subject of the action, the public service company demanded a rate greater than that lawful under this division when the charge was made.
(a) This section does not apply to service rendered or commodities furnished: (1) to the officers, employees, pensioners, and immediate family members of the officers, employees, and pensioners of a public service company; (2) to the United States, the State, or a local government; (3) to provide relief in cases of general epidemic, pestilence, flood, or other similar calamity; […]
