Section 13-503. Teachers' retirement association; membership

The teachers'
  retirement association is continued. Its membership shall consist of the
  following:
    1. All teachers.
    2. All transferred contributors.
    3. Notwithstanding any inconsistent provision of sections  13-267  and
  13-379  of  this chapter, or any other provision of this chapter, or the
  code, or any other law, a teacher, as defined in this chapter, who files
  with the board a statement duly executed and acknowledged consenting for
  the  period  of  his  or  her  active  membership  in  this   retirement
  association to the suspension of all present benefits provided wholly or
  partly  by  the city through any other retirement system or pension fund
  and consenting and agreeing to membership  and  to  the  deductions  for
  annuity  purposes  prescribed  in  this  chapter.  Upon  the  subsequent
  retirement of such person from this retirement system, he or  she  shall
  receive  benefits based on city service not included in the service upon
  which his or  her  retirement  allowance  or  pension  from  such  other
  retirement  system  or pension fund is or would be based, and, upon such
  subsequent retirement, payment of the  benefits  provided  through  such
  other retirement system or pension fund, which had been suspended, shall
  be resumed.