Maryland Code, Transportation § 16-107

(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.

(2) Certify that the statements made in the application are true to the best of the cosigner's knowledge, information, and belief.