Md. Code Ann., Gen. Prov. § 4-1A-05

(a) Any applicant, the applicant’s designated representative, or a custodian may file a written complaint with the Board seeking a written decision and order from the Board under § 4–1A–04 of this subtitle if: (1) the complainant has attempted to resolve the dispute through the Office of the Public Access Ombudsman under § 4–1B–04 of this title; and (2) the Public Access Ombudsman has issued a final determination stating that the dispute was not resolved.

(b) The complaint shall: (1) identify the custodian or applicant that is the subject of the complaint; (2) describe the action of the custodian or applicant, the date of the action, and the circumstances of the action; (3) be signed by the complainant; (4) if available, include a copy of the original request for public records and the custodian’s response, if any; and (5) be filed within 30 calendar days after the complainant receives the final determination of the Public Access Ombudsman under § 4–1B–04 of this title.