Section 216. Constitutional convention delegates and employees

a.
  Notwithstanding anything to the contrary contained in  this  article  or
  any  other section of this chapter or any other provision of any general
  or local law, a member retired from any public  pension  system  of  the
  state,  elected  as a delegate of the convention to revise and amend the
  constitution of the state in the year nineteen hundred  sixty-seven,  or
  serving   as   an  employee  of  such  convention  may  serve  and  earn
  compensation in such position without any effect on his status  as  such
  retired  member  and  without suspension or diminution of his retirement
  allowance.
    b. Member service credit may  not  be  purchased  or  granted  in  any
  retirement  system  or  pension plan administered by the state or any of
  its political subdivisions for any period of  service  in  the  capacity
  prescribed by subdivision a.