Md. Code, Transp. § 16-107

(a) The application of a minor for a license shall be cosigned by: (1) A parent or guardian of the applicant; (2) If the applicant has no parent or guardian or is married, an adult employer of the applicant or any other responsible adult; or (3) If the applicant is committed to the custody or guardianship of a local department of social services, the director of the department or the director’s designee. (b) The individual cosigning the application of a minor shall: (1) (i) Provide the cosigner’s mailing address to the Administration; and (ii) Within 30 days of any change in the mailing address occurring while the applicant or licensee is a minor, notify the Administration of the change; and (2) Certify that the statements made in the application are true to the best of the cosigner’s knowledge, information, and belief.