Md. Code, Public Utilities § 2–306

(a) Until at least 2 years have passed after leaving service as a commissioner or the People’s Counsel, an individual may not:

(1) represent a public service company before the Commission;

(2) appear before the Commission on behalf of a party to a Commission proceeding; or

(3) appear before the Commission on a matter within the jurisdiction of the Commission.

(b) Until at least 1 year has passed after leaving service with the Commission as the General Counsel or a public utility law judge, an individual may not:

(1) represent a public service company before the Commission;

(2) appear before the Commission on behalf of a party to a Commission proceeding; or

(3) appear before the Commission on a matter within the jurisdiction of the Commission.

(c) Until at least 1 year has passed after leaving service with the Commission as a commissioner, an individual may not receive financial benefit that is not otherwise generally available to the public as a customer of a public service company from:

(1) a public service company that is subject to the jurisdiction of the Commission; or

(2) a person that directly or indirectly, or through one or more intermediaries, controls, is controlled by, or is under common control with a public service company that is subject to the jurisdiction of the Commission.