Gravely Disabled:  A condition in which a person is unable to provide for his basic personal needs (such as food, clothing and shelter) as a result of a mental illness of a type which has:

(i) developed over a long period of time and has a long duration; or

(ii) developed as a manifestation of degenerative brain disease during old age; or

(iii) developed as a manifestation of some other degenerative physical illness of long duration.