Maryland Public Utility Companies Section 4-203

      (a)      Unless otherwise ordered by the Commission, a public service company may not establish a new rate or change in rate unless the public service company:

            (1)      provides to the Commission notice of the new rate or change in rate at least 30 days before the new rate is established or current rate is changed; and

            (2)      publishes the new rate or change in rate in accordance with § 4-202 of this subtitle during the entire 30 day notice period in new schedules or plainly indicated amendments to existing schedules.

      (b)      The public service company shall plainly set forth in the notice and publication:

            (1)      the changes that it proposes to the rate schedules currently in force; and

            (2)      the effective date of the changes.