Disability benefits shall be increased to 80 percent of creditable compensation for any disabled participating employee who (i) is unable to perform at least two of the six activities of daily living due to a loss of functional capacity or (ii) requires substantial supervision to protect the employee from threats to health and safety as a result of severe cognitive impairment. Determination of whether a participating employee satisfies either of these conditions shall be made in accordance with the policies of the Board or its designee.