Md. Code, Public Utilities § 3–114

(a) On rehearing, the Commission may:

(1) consider facts not presented in the original hearing, including facts arising after the date of the original hearing; and

(2) abrogate, change, or modify the original order by new order.

(b) Except as otherwise ordered by the Commission, the rehearing or application for the rehearing does not:

(1) stay the enforcement of an order of the Commission; or

(2) excuse a person affected by the order from complying with the terms of the order.

(c) (1) A party in interest may apply to the Commission for rehearing within 30 days after service of a final order on the party.

(2) The Commission may:

(i) act on the application; and

(ii) rehear a final order or conduct further proceedings on its own motion after the filing of a proposed order, as the Commission considers necessary.

(3) If a rehearing is granted on an application under this subsection, the Commission shall decide the case within 30 days after the case is finally submitted on rehearing.