It is a fundamental requirement for relief under the disabled drivers and disabled passengers scheme that the applicant must meet the medical criteria specified in the relevant regulations and be in possession of a primary medical certificate to that effect issued by the appropriate senior area medical officer, who is an official of the local health board. Where the issue of the primary medical certificate is refused, this may be appealed to the Disabled Drivers Medical Board of Appeal, an independent body whose decision is final. It should be noted that neither my Department nor the Revenue Commissioners has any role in the medical assessment of persons for the purposes of admission to the scheme.