As used in this article:

1. (1) "Handicapped" means a person who:

   1. (a) has an obvious physical disability that impairs the ability to walk or requires the use of a wheelchair, braces, walkers, or crutches;
   2. (b) has lost the use of one or both legs;
   3. (c) suffers from lung disease to such an extent that he is unable to walk without the aid of a respirator;
   4. (d) is disabled by an impairment in mobility; or
   5. (e) is determined by the Social Security Administration or the Veterans Administration to be totally and permanently disabled.
2. (2) A licensed physician shall certify that the total and permanent disability substantially impairs the ability to walk, unless the applicant is an agency or organization complying with Section 56-3-1910.