§  806.  Exclusion. a.  A  person  who was not a member of a public  retirement  system  as of March thirty-first, nineteen hundred  ninety-three  shall  be ineligible for the benefits provided by sections  eight hundred one and eight hundred three of this article. b. This article shall have no  application  to  a  retiree  or  former  retiree from a public retirement system.