Section 319. 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  policemen's  and  firemen's
  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.