To be eligible for AABD on the condition of disability the person must be suffering from a permanent physiological, mental or psychological impairment that, when considered in connection with the pertinent socio-economic conditions, results in his being substantially unable to engage in employment or homemaking within his remaining ability.

“Physiological, mental or psychological impairment” includes: injury, illness and disease, or their residual effects; mental deficiency or mental retardation; and psychosis, neurosis (psychoneurosis) or personality disorders.

A “permanent” impairment is one which is not likely to respond to any known therapeutic procedure, is likely to remain unchanged, or may become progressively worse because the only known therapeutic procedures to which it may be amenable are unavailable, inadvisable or may be reasonably refused.

To be “substantially unable to engage in employment” means the client, by virtue of his permanent impairment, and taking into consideration his remaining abilities is substantially precluded from engaging in a useful occupation.