Section 19. Filing of documents with the retirement system

Whenever a
  statute requires that a document be filed with the state comptroller, as
  administrative head of the New York state employees' retirement  system,
  within  a  prescribed  period  of  time or by a specified date, and such
  document has been mailed to the comptroller or the retirement system  by
  United  States  Postal Service certified mail, return receipt requested,
  the  document  shall  be  deemed  filed  on   the   date   of   mailing.
  Notwithstanding this provision, no document shall be deemed filed on the
  date  of mailing unless it is actually received by the retirement system
  as a result of such mailing.