Section 13-358. Retirement allowances of original plan members; for service

a.  Subject to the provisions of subdivision b  of  this  section,  upon
  retirement  for  service  an original plan member not subject to article
  eleven (as defined in subdivision  four-c  of  section  13-313  of  this
  subchapter) shall receive a retirement allowance which shall be equal to
  one-half  his  or  her  final compensation plus, for each year he or she
  shall have served in the uniformed force of the  fire  department  after
  having  attained the minimum period of service retirement elected by him
  or her, the additional  amount  provided  for  by  section  two  hundred
  seven-b of the general municipal law with respect to such year.
    b.  In  addition to the benefits provided for in subdivision a of this
  section, an original plan member not subject  to  article  eleven,  upon
  retirement  for  service,  shall  receive,  for  each  year, or fraction
  thereof, of service credit transferred from the New York city employees'
  retirement system, a  retirement  allowance  of  fifty-five  percent  of
  one-sixtieth  of  his  or  her  five-year-average-salary  (as defined in
  subdivision twenty-eight of section 13-313 of this subchapter)  if  such
  service credit was for service rendered prior to October first, nineteen
  hundred  fifty-one or seventy-five percent of one-sixtieth of his or her
  five-year-average-salary if  such  service  was  rendered  on  or  after
  October  first,  nineteen  hundred  fifty-one. Nothing contained in this
  subdivision b shall be construed  as  denying  or  impairing  any  right
  granted  to any member by any other provision of law with respect to any
  such transferred service credit which consists of credit for service  as
  a  member  of  a  uniformed  force,  the  members of which, during their
  service in such force, are eligible for membership in the New York  city
  employees' retirement system.
    c.  Upon  retirement  for  service, an original plan member subject to
  article eleven (as defined in subdivision four-d of  section  13-313  of
  this   subchapter)  shall  receive  a  retirement  allowance  determined
  pursuant to the provisions of subdivisions a  and  b  of  this  section,
  except  to  the  extent  and  in  the  manner that any such provision is
  modified by article eleven.