Any person may request to inspect any public record in the custody and control of the Department. The Departmental custodian may require that the request be in writing. An applicant may request in writing a copy of a record. In a written request, the applicant shall show his or her name and address, shall sign the request, and shall reasonably identify by brief description the record sought. The applicant shall address a written request for a record in the custody and control of the Department to the Departmental custodian of the record, or if the custodian of the record is unknown to the applicant, the request may be addressed to the Secretary.