Section 13-692. Payment of supplemental retirement allowances

a. On or
  before the last day of each month during the payment period mentioned in
  subdivision a of section 13-691 of this chapter,  there  shall  be  paid
  from  the  supplemental  pension  fund  to each retiree entitled thereto
  under such section, the  applicable  supplemental  retirement  allowance
  prescribed by such section.
    b.  On  or  before the last day of each month with respect to which an
  additional supplemental retirement  allowance  is  payable  pursuant  to
  section  thirty or section thirty-one of chapter six hundred fifty-eight
  of the laws of nineteen hundred eighty-four, there shall  be  paid  from
  the  supplemental  pension fund to each pensioner entitled thereto under
  either such section, the applicable additional  supplemental  retirement
  allowance prescribed by such section.