In general. Persons are permitted to participate in proceedings before the Administrative Hearing Unit as provided in this section. Individuals. An individual respondent may appear: in person, in his or her own behalf; by an attorney licensed to practice in the State of Maryland; or by an person with a valid Power of Attorney that meets the requirements set forth by the Administrative Hearing Unit. Businesses. A business, non-profit organization, or government agency may appear: by an attorney licensed to practice in the State of Maryland; or to the extent allowed by law, by any officer, employee, or authorized agent.