Upon the filing of a request for a full evidentiary hearing the licensee or vendor shall be informed of all information in the case file and shall have the right of access to, and may examine any file or record owned by the department regarding his/her case which may contain information relevant and material to his/her grievance; except for documents and information disclosure of which is prohibited by federal or state law, and/or rules and regulations. This right of access to and examination of information shall be extended to the licensee's or vendor's representative, attorney and/or the blind vendors committee when functioning as an advocate for the licensee or vendor if so authorized in writing by the licensee or vendor or his/her legal guardian.