Recipients of social welfare or health board payments who have been prescribed a special diet as a result of a specified medical condition and whose means are insufficient to meet their needs may qualify for a diet supplement under the supplementary welfare allowance scheme. Entitlement to a diet supplement is determined by the health boards in accordance with the legislative provisions which specify the medical conditions in respect of which a diet supplement may be paid and the means test which must be applied. The amount of supplement payable depends on which of two categories of diet has been prescribed by the applicant's medical adviser, the age of the person and on the income of the individual and his-her dependants.