Section 13-505. Credit for service and service certificates

a. In computing
  the length of service of a contributor for retirement purposes under the
  provisions of this chapter, full credit up  to  the  nearest  number  of
  years  and  months  shall  be  given  each contributor by the retirement
  board:
    1. For all city-service; and
    2. In the case of present-teachers for  all  teaching  or  supervisory
  service in schools and colleges not maintained by the city; and
    3.  (a)  In  the  case of new-entrants for all teaching or supervisory
  service in schools and colleges not maintained by the city, and for  all
  service  rendered  in the employ of the Works Progress Administration or
  of  any  other  agency  of  the  government  of  the  United  States  on
  educational  projects  in  the  schools  of  the  city of New York or in
  conjunction with educational projects of the board of education  of  the
  city  of  New  York during the period commencing January first, nineteen
  hundred thirty-three and ending December thirty-first, nineteen  hundred
  forty-three,  provided that in no case shall the total amount of service
  subject to purchase exceed fifteen years, and furthermore provided  that
  for  any  such  new-entrant who becomes a contributor for the first time
  after June thirtieth, nineteen hundred thirty-five, except as  otherwise
  provided  in  this  section,  credit  for service previous to becoming a
  contributor shall be given only to the extent that  reserves  sufficient
  to  purchase  credit  for  such  previous service are transferred to the
  teachers' retirement system on behalf of the  contributor  from  another
  pension  system or are paid in a lump sum by the contributor, whether or
  not such contributor was a member of another pension system.
    (b)  In  all  cases  except  transfers  under  section  five   hundred
  twenty-two  of  the  education law and forty-three of the retirement and
  social security law, if  the  reserve  transferred  is  insufficient  to
  purchase  such  previous  service, the contributor shall be permitted to
  pay a lump sum equal to the deficiency.
    (c) Any special or general law, except section five hundred twenty-two
  of the education law  and  forty-three  of  the  retirement  and  social
  security  law,  to  the  contrary  notwithstanding,  the amount of money
  necessary to purchase such prior service or part thereof  shall  be  the
  amount of money determined by the actuary to be equal to the reserve the
  city  would  have  been required to contribute to the contingent reserve
  fund in the same manner  as  provided  in  section  forty-three  of  the
  retirement and social security law, if such service or part thereof were
  rendered  to  the  city while a member based upon the salary received at
  the date of purchase.
    (d) Credit for such prior service up to a  maximum  of  fifteen  years
  shall  be  given only if application and payment therefor is made by the
  contributor within the first four years subsequent to membership in  the
  New   York   city   teachers'   retirement  system  or  before  December
  thirty-first, nineteen hundred sixty-nine, whichever is later.
    (e) Members of the New York city teachers' retirement system who  held
  membership in such system on January first, nineteen hundred fifty-nine,
  shall  be  permitted  to  purchase  credit  for prior service under this
  subdivision provided that they make application and payment therefor  on
  or before December thirty-first, nineteen hundred sixty-nine.
    (f)  Subject  to  the provisions of subparagraph (j) of this paragraph
  three, such members who held  membership  on  December  first,  nineteen
  hundred  fifty-eight shall have the right to purchase such prior service
  credit at the rate applicable to them as  of  December  first,  nineteen
  hundred fifty-eight.
    (g)  Subject  to  the  provisions of subparagraphs (j) and (k) of this
  paragraph three, such members who entered into membership subsequent  to

  December  first,  nineteen  hundred  fifty-eight shall have the right to
  purchase such prior service credit at the rate applicable to them as  of
  the time of their entry into membership.
    (h)  Any transfer of a reserve from another pension system or lump sum
  paid by a contributor  under  this  subdivision  shall  at  no  time  be
  refunded.
    (i)  The  contributor shall have the option of transferring his or her
  contributions from another pension system to  the  teachers'  retirement
  system  which contributions shall be paid into the contributor's annuity
  account.
    (j) (1) Any contributor who:
    (a) last entered or shall last  enter  membership  in  the  retirement
  system prior to July first, nineteen hundred seventy; and
    (b) heretofore and on or after July first, nineteen hundred sixty-nine
  filed   a   timely   application,  in  accordance  with  the  applicable
  requirements of the preceding subparagraphs of this paragraph three,  to
  purchase  credit  for  prior  outside  service  or  any part thereof, or
  hereafter files a timely application in accordance with  the  applicable
  requirements of this paragraph three to purchase credit for such service
  or any part thereof; and
    (c)   is   not   a   twenty-year   pension  plan  contributor  or  age
  fifty-five-increased-benefits pension plan contributor at  the  time  of
  filing  such application, in any case where such application is filed on
  or after July first, nineteen hundred seventy; shall  not  be  eligible,
  whether  or  not he or she has paid the purchase price for prior outside
  service credit pursuant to  such  application,  to  elect  to  become  a
  twenty-year       pension       plan       contributor       or       an
  age-fifty-five-increased-benefits pension plan contributor unless he  or
  she  files  with  his or her application to become such a contributor, a
  consent that the purchase price of credit for his or her  prior  outside
  service  shall be recalculated in accordance with the provisions of item
  four of this subparagraph (j) and that his or her rights with respect to
  the purchase of credit  for  such  service,  or  where  he  or  she  has
  previously  paid  the  purchase  price of credit for such service or any
  part thereof, his or her rights as to any such purchased  credit,  shall
  be as prescribed in items two to six inclusive of this subparagraph (j).
    (2)  In  the  case  of  any  such  contributor who has filed a consent
  pursuant to item one of this subparagraph (j) and who has not previously
  paid the purchase price of credit for prior outside service or any  part
  thereof,  the  retirement  system  shall  notify such contributor of the
  purchase  price,  as  recalculated  pursuant  to  item  four   of   this
  subparagraph,  of  credit  for  the number of purchaseable years of such
  service designated by him or her in his or her application to purchase.
    (3) In the case of any  such  contributor  who  has  filed  a  consent
  pursuant  to  item  one  of this subparagraph (j) and who has previously
  paid the purchase price of credit for prior outside service or any  part
  thereof, the retirement system shall notify such contributor of:
    (i) the amount of the excess of:
    (1)   the  recalculated  purchase  price,  under  item  four  of  this
  subparagraph (j), of credit for  such  prior  outside  service  or  part
  thereof; over
    (2)  the  purchase  price previously paid by such contributor for such
  credit; and
    (ii) the amount of prior outside service for  which  such  contributor
  would  be credited, if the credit based on the purchase price previously
  paid by him or her were reduced to the credit which such purchase  price
  would  purchase  under  the provisions of item four of this subparagraph
  (j).

    (4) The recalculated purchase price of credit for  the  prior  outside
  service  of  any  such  contributor, whether he or she seeks to elect to
  become    a    twenty-year    pension    plan    contributor    or    an
  age-fifty-five-increased-benefits  pension  plan  contributor,  shall be
  computed:
    (i)  on  the  basis of the salary which was used or was required to be
  used, pursuant to the provisions of the preceding subparagraphs of  this
  paragraph  three,  to calculate the prior purchase price which he or she
  paid or was required  to  pay  to  purchase  credit  for  prior  outside
  service; and
    (ii) on the basis of the larger of the following two amounts:
    (1)  the  amount  which the required reserve under subparagraph (c) of
  this paragraph three would equal, if computed on the basis of his or her
  retirement for service as an  age-fifty-five-increased-benefits  pension
  plan contributor, so as to provide a pension equal to one and two-tenths
  per  centum  of  his  or  her  average salary for each year of the prior
  outside service with respect to which such recalculation is made; or
    (2) the amount which the required reserve under  subparagraph  (c)  of
  this paragraph three would equal, if computed on the basis of his or her
  retirement  for service as a twenty-year pension plan contributor, so as
  to provide a pension equal to one and two-tenths per centum  of  his  or
  her  average  salary  for  each  year  of the prior outside service with
  respect to which such recalculation is made.
    (5) If any such contributor mentioned in item two of this subparagraph
  (j) shall, within thirty days after the notification  required  by  such
  item  two,  pay to the retirement system the recalculated purchase price
  of credit, as set forth  in  such  notification,  he  or  she  shall  be
  entitled  to  credit  for such period of prior outside service. If he or
  she shall fail to make any such payment within  such  period  of  thirty
  days,  his or her application to purchase prior outside service pursuant
  to which such notification was made shall be null and void and he or she
  shall have no further rights under such application.
    (6) (i) If any such  contributor  mentioned  in  item  three  of  this
  subparagraph  (j)  shall,  within  thirty  days  after  the notification
  required by such item three, pay to the retirement system the amount  of
  the  excess  set  forth  in such notification pursuant to subitem (i) of
  such item three, he or she shall be credited with the  period  of  prior
  outside service for which he or she previously paid the purchase price.
    (ii) If any such contributor shall, within such period of thirty days,
  fail  to make the payment mentioned in subitem (i) of item three of this
  subparagraph (j), he or she shall be credited with the reduced period of
  prior outside service as set forth  in  such  notification  pursuant  to
  subitem (ii) of such item three, and shall not be entitled to credit for
  any other prior outside service.
    (k)  (1)  Subject  to  the  provisions  of items two and three of this
  subparagraph  (k),  any  twenty-year   pension   plan   contributor   or
  age-fifty-five-increased-benefits  pension  plan  contributor shall have
  the right to purchase credit for  prior  outside  service  or  any  part
  thereof  within the period of time prescribed by, and in accordance with
  the applicable provisions of subparagraphs (a) to  (d),  inclusive,  and
  (h) and (i) of this paragraph three, except as otherwise provided by the
  applicable provisions of items four and five of this subparagraph (k).
    (2)  The  provisions  of  item  one  of  this subparagraph (k) and the
  applicable provisions of items four and five of this subparagraph  shall
  not   apply   to   any   twenty-year   pension   plan   contributor   or
  age-fifty-five-increased-benefits pension plan contributor  who,  before
  becoming such a contributor:

    (i)  filed an application to purchase credit for prior outside service
  under the circumstances specified in item one  of  subparagraph  (j)  of
  this paragraph three; and
    (ii) paid the purchase price, as then in effect, for such credit.
    (3)  In  any  case  where  any twenty-year pension plan contributor or
  age-fifty-five-increased-benefits  pension  plan   contributor,   before
  becoming such a contributor:
    (i)  filed an application to purchase credit for prior outside service
  under the circumstances specified in item one  of  subparagraph  (j)  of
  this paragraph three; and
    (ii)  did  not,  before  becoming such a contributor, pay the purchase
  price, as then in effect, for such credit; and
    (iii) does not pay the recalculated purchase  price  for  such  credit
  pursuant to item five of such subparagraph (j); and
    (iv)  would otherwise be eligible to purchase credit for prior outside
  service pursuant  to  the  provisions  of  this  subparagraph  (k);  the
  provisions  of  item  one  of  this  subparagraph (k) and the applicable
  provisions of items four and five of this subparagraph shall  not  apply
  to  such  contributor  until such application to purchase credit becomes
  null  and  void  pursuant  to  the  provisions  of  item  five  of  such
  subparagraph (j).
    (4)  If  all  of the prior outside service rendered at any time by any
  contributor to whom the provisions of item one of this subparagraph  (k)
  are  applicable  was  rendered  prior  to  July  first, nineteen hundred
  seventy, the purchase price to be paid by such contributor,  whether  he
  or   she   is   a   twenty-year   pension   plan   contributor   or   an
  age-fifty-five-increased-benefits pension plan contributor, shall be the
  larger of the two amounts computed as prescribed by subitem (ii) of item
  four of subparagraph (j) of this paragraph three.
    (5) If any part of the prior outside service  of  any  contributor  to
  whom  the provisions of item one of this subparagraph (k) are applicable
  was rendered on or after  July  first,  nineteen  hundred  seventy,  the
  purchase  price to be paid by such contributor, whether or not he or she
  rendered prior outside service prior to such date, and whether or not he
  or   she   is   a   twenty-year   pension   plan   contributor   or   an
  age-fifty-five-increased-benefits pension plan contributor, shall be the
  larger of the following two amounts:
    (i)  the  amount  which the required reserve under subparagraph (c) of
  this paragraph three would equal, if computed on the basis of his or her
  retirement for service as an  age-fifty-five-increased-benefits  pension
  plan contributor so as to provide a pension equal to one and fifty-three
  one  hundredths per centum of his or her average salary for each year of
  such prior outside service for which he or she seeks to purchase credit;
  or
    (ii) the amount which the required reserve under subparagraph  (c)  of
  this paragraph three would equal, if computed on the basis of his or her
  retirement  for service as a twenty-year pension plan contributor, so as
  to provide a pension equal to one and seven-tenths per centum of his  or
  her average salary for each year of such prior outside service for which
  he or she seeks to purchase credit.
    (1)  In  any  case  where  any twenty-year pension plan contributor or
  age-fifty-five-increased-benefits pension plan contributor:
    (a) dies or retires; and
    (b) in order to obtain credit for any prior outside service, had  paid
  therefor:
    (i)  a  recalculated  purchase  price  or  any  part  thereof computed
  pursuant to subitem (ii) of  item  four  of  subparagraph  (j)  of  this
  paragraph three; or

    (ii)  a  purchase price computed pursuant to item four or item five of
  subparagraph (k) of this paragraph three; on  the  basis  of  a  reserve
  larger  than  that  which  would have been computed with respect to such
  contributor if such reserve had  been  computed  on  the  basis  of  the
  pension  plan  in effect with respect to such contributor at the time of
  his or her death or retirement, any excess of the total  purchase  price
  paid  by him or her for such prior outside service over the amount which
  such total purchase price would have equalled if  such  computation  had
  been  made  on  the  basis of the pension plan in effect with respect to
  such contributor at the time of his or her death  or  retirement  shall,
  together  with regular interest on such excess from the date on which he
  or she paid such excess, be deemed, for the  purpose  of  computing  the
  benefit  payable by reason of such death or retirement, to be additional
  contributions by such contributor.
    4. In the case of new-entrants  who  are  members  of  the  retirement
  system  on  July  first,  nineteen  hundred sixty-nine and who have been
  serving as school secretaries, for all secretarial and clerical  service
  rendered  in regular employment in the civil service of the state of New
  York and its political subdivisions, except for service in cities having
  a population of  one  million  or  more,  provided  that  for  any  such
  new-entrant  who  becomes  a  contributor  for the first time after June
  thirtieth, nineteen hundred thirty-five, except as otherwise provided in
  this section, credit for service  previous  to  becoming  a  contributor
  shall  be  given only to the extent that reserves sufficient to purchase
  credit for such  previous  service  are  paid  in  a  lump  sum  by  the
  contributor;  provided,  however, that no credit shall be purchasable if
  the contributor has obtained or is eligible to obtain  credit  for  such
  service  by  transfer  under  section  five  hundred  twenty-two  of the
  education law or  section  forty-three  of  the  retirement  and  social
  security  law.  Any  special or general law, except section five hundred
  twenty-two  of  the  education  law  and  section  forty-three  of   the
  retirement and social security law, to the contrary notwithstanding, the
  amount of money necessary to purchase such prior service or part thereof
  shall  be  the  amount of money determined by the actuary to be equal to
  the reserve the city would have  been  required  to  contribute  to  the
  contingent  reserve  fund  in  the  same  manner  as provided in section
  forty-three of the retirement and social security law, if  such  service
  or  part thereof were rendered to the city while a member based upon the
  salary received and, except as otherwise provided in paragraph seven  of
  this  subdivision a, the rate applicable at the date of purchase. Credit
  for such prior service up to a maximum of fifteen years, less the amount
  of credit,  if  any,  acquired  pursuant  to  paragraph  three  of  this
  subdivision,  shall be given only if application and payment therefor is
  made by  the  contributor  prior  to  January  first,  nineteen  hundred
  seventy. Any lump sum paid by a contributor under this subdivision shall
  at no time be refunded.
    5.  (a)  In the case of new-entrants who are members of the retirement
  system on July first, nineteen hundred  sixty-nine  and  who  have  been
  serving as teachers of library, for all service as librarian rendered in
  regular  employment  in libraries within the state of New York supported
  in whole or in part by public funds, except for libraries maintained  in
  the  schools  of  cities  having  a  population  of one million or more,
  provided that for any such new-entrant who becomes a contributor for the
  first time after June thirtieth, nineteen hundred thirty-five, except as
  otherwise provided in this  section,  credit  for  service  previous  to
  becoming  a  contributor shall be given only to the extent that reserves
  sufficient to purchase credit for such previous service are  paid  in  a
  lump  sum by the contributor. Any special or general law, except section

  five hundred twenty-two of the education  law  and  forty-three  of  the
  retirement and social security law, to the contrary notwithstanding, the
  amount of money necessary to purchase such prior service or part thereof
  shall  be  the  amount of money determined by the actuary to be equal to
  the reserve the city would have  been  required  to  contribute  to  the
  contingent  reserve  fund  in  the  same  manner  as provided in section
  forty-three of the retirement and social security law, if  such  service
  or  part thereof were rendered to the city while a member based upon the
  salary received and, except as otherwise provided in subparagraph (c) of
  this paragraph five, the rate applicable at the date of purchase. Credit
  for such prior service up to a maximum of fifteen years, less the amount
  of credit,  if  any,  acquired  pursuant  to  paragraph  three  of  this
  subdivision,  shall be given only if application and payment therefor is
  made by  the  contributor  prior  to  January  first,  nineteen  hundred
  seventy. Any lump sum paid by a contributor under this subdivision shall
  at no time be refunded.
    (b)  For purposes of this paragraph five, "service as librarian" shall
  mean service by a person trained in  library  science  working  in  such
  regular employment as is deemed by the retirement board to be related to
  the  functions  of  teacher of library in the city of New York, provided
  that such service was credited for retirement purposes in the  New  York
  state  teachers'  retirement  system or in the New York state employees'
  retirement system but that credit for such service was not obtained  nor
  is the contributor, at the time of application for purchase, eligible to
  obtain  credit  for  such service by transfer under section five hundred
  twenty-two of the education law or section forty-three of the retirement
  and social security law.
    6. Service, credit for which shall not  exceed  three  years,  in  any
  branch  of the armed forces of the United States prior to October first,
  nineteen hundred twenty, provided, however, that such member shall,  for
  the  period  of  service  with  the  armed  forces,  contribute  to  the
  retirement system an amount he  or  she  would  have  been  required  to
  contribute  if such service was rendered to the city while a member, and
  provided further, that  such  member,  during  the  period  between  the
  termination  of such military service and the retirement of such member,
  shall have been credited with not less than fifteen years of  member  or
  restored  member  service.  Duly  executed applications for such service
  credit shall be filed with the retirement system before the first day of
  September, nineteen hundred fifty-nine.
    7. Any contributor who files an application  to  purchase  credit  for
  prior  outside  service  pursuant to paragraph four or paragraph five of
  this subdivision a and  who  thereafter  seeks  to  elect  to  become  a
  twenty-year       pension       plan       contributor       or       an
  age-fifty-five-increased-benefits pension plan  contributor  shall  not,
  whether  or  not  he  or she has paid the purchase price for such credit
  pursuant to such paragraph four or paragraph five, be eligible to become
  such a contributor unless he or she complies with  the  requirements  of
  subparagraph (j) of paragraph three of this subdivision a.
    8.  Notwithstanding  any  other  law to the contrary, a person who has
  previously transferred or who shall  transfer  from  another  retirement
  system to this system in accordance with section five hundred twenty-two
  of  the  education law, section forty-three of the retirement and social
  security law, or any other applicable law shall receive, in addition  to
  his or her transferred service credit, all service credit to which he or
  she  would  have  been  entitled under paragraph one of subdivision a of
  this section had he or  she  not  transferred  from  another  retirement
  system, provided, however, that credit for such service was not included
  in the service credit transferred by the other retirement system.

    9.  Notwithstanding  any  other  law to the contrary, a member who has
  received service credit for seniority and  length  of  service  purposes
  pursuant  to  subdivision  eight  of section eighty of the civil service
  law, shall receive service credit for retirement purposes for  the  same
  period  provided  the  member  pays into the annuity savings fund of the
  retirement system the amount of the employee contributions  required  to
  have  been  paid into the retirement system for such service, within one
  year from the date this paragraph shall have taken effect,  and  further
  provided  that  the  member  has  not  previously  received  credit  for
  retirement purposes for the same period.
    b. Under such rules and regulations as such board  shall  adopt,  each
  teacher  shall  file  with  such  board a detailed statement of all such
  service rendered by him or her. As soon as practicable thereafter,  such
  board shall verify such statement as to prior-service and shall issue to
  each  teacher a certificate certifying to the aggregate length of his or
  her prior-service. Such certificate shall be final and conclusive as  to
  his or her prior-service unless thereafter modified by:
    1. Such board upon application by the teacher; or
    2. By the board of education upon application by the teacher or by the
  retirement  board, provided such application for modification be made to
  the board  of  education  within  one  year  after  the  issuance  of  a
  certificate or a modified certificate by the retirement board.
    c.  A  certificate for prior-service issued to a present-teacher shall
  certify  the  total  length  of   prior-service   allowance   for   such
  present-teacher through the sixteenth day of September, nineteen hundred
  seventeen.  The  time  during which a contributor was absent on leave of
  absence without pay shall not be counted in computing the  prior-service
  or  the  total-service of a contributor, unless allowed both by the head
  of the department in which such contributor was  employed  at  the  time
  such  leave of absence was granted and by the retirement board. The time
  during which a contributor was absent on leave of absence on full pay or
  part-pay from the city-service shall be counted in computing the  prior-
  service  and  the  total-service of such contributor. For the purpose of
  computing prior-service the retirement board shall fix and determine  by
  appropriate rules and regulations how much service rendered on the basis
  of  the hour, day or session, or any other than a per annum basis, shall
  be the equivalent of a year of service. No allowance shall be  made  for
  such  service  as  a  substitute teacher, night school teacher, vacation
  school teacher, or for any service rendered in a position to  which  the
  contributor  was  not  regularly  appointed  and  served  on a per annum
  salary, unless such service was city-service or teaching or  supervisory
  service  under  regular  appointment  rendered in the public day schools
  other than summer schools of New York state for ten or more  consecutive
  weeks,  except such service rendered in the employ of the Works Progress
  Administration or of any other agency of the government  of  the  United
  States on educational projects in the schools of the city of New York or
  in  conjunction  with  educational projects of the board of education of
  the city of  New  York  during  the  period  commencing  January  first,
  nineteen hundred thirty-three and ending December thirty-first, nineteen
  hundred  forty-three,  as provided in subdivision (a) of paragraph three
  of this section. Except as to credits or allowances erroneously  granted
  for attendance as a pupil at a training school for teachers, or clerical
  or   mathematical   errors   in  the  computation  of  prior-service,  a
  prior-service certificate issued to any contributor  by  the  retirement
  board  prior  to the fourth day of May, nineteen hundred thirty-five and
  not modified prior to the fourth day of May, nineteen hundred thirty-six
  shall not have the service certified therein reduced.

    d. Notwithstanding any provision of law to the contrary, in  the  case
  of employees of the city university of New York, appointed subsequent to
  January  first,  nineteen  hundred  fifty-six,  prior service for hourly
  teaching employment by this board shall be granted as follows: a  credit
  of one year of city service for retirement purposes shall be allowed for
  a  minimum  of  thirty weeks per year with an average service of fifteen
  hours of teaching per week (four hundred fifty hours per year), provided
  that no such employee shall receive more than one  year  of  credit  for
  service rendered during one calendar year.
    e.  Notwithstanding any other provision of law, any contributor who is
  in the system as of April first, nineteen hundred sixty-three and  whose
  prior-service  certificate  was  issued  prior to the fourth day of May,
  nineteen hundred thirty-five and not modified prior to the fourth day of
  May, nineteen hundred  thirty-six  may  file  an  application  with  the
  retirement   board   on  or  before  November  first,  nineteen  hundred
  sixty-three for modification of said prior-service certificate  for  the
  purpose  of  claiming allowable retirement credit for prior city-service
  as teacher-in-training in the employ of the board of  education  of  the
  city  of  New  York.  Such  certificates  shall be subject to review and
  modification by the retirement board and any such modified  certificates
  are  hereby validated and confirmed to the same extent and with the same
  effect as if issued after  the  fourth  day  of  May,  nineteen  hundred
  thirty-six.   The   rate   of  contribution  of  any  contributor  whose
  prior-service certificate is modified pursuant to the provisions of this
  subdivision shall be increased  so  that  the  cost  of  the  additional
  service  credit is prorated over said contributor's anticipated years of
  service.
    f. Notwithstanding any other provision of  law  to  the  contrary,  in
  computing the length of service of a contributor for retirement purposes
  under  the  provisions  of  this  chapter, full credit up to the nearest
  number of years and months  shall  be  given  each  contributor  by  the
  retirement  board for all service that would have been creditable in one
  of the public retirement systems of the state, as defined in subdivision
  twenty-three of section five hundred one of the  retirement  and  social
  security  law, at the time the service was rendered, had the contributor
  been a member of such retirement system. Credit for such  prior  service
  up  to a maximum of fifteen years shall be given only if application and
  payment therefor is made by the contributor within the first four  years
  subsequent  to  membership  in  the  New  York city teachers' retirement
  system or before December thirty-first, two thousand two,  whichever  is
  later.  Contributors shall have the right to purchase such prior service
  credit at the rate applicable to them as of the time of their entry into
  membership.
    * g. Notwithstanding any other provision of law, any member of the New
  York city teachers' retirement system eligible to  purchase  credit  for
  prior service with a public employer pursuant to this section, may elect
  to  purchase  any or all of such service by executing a periodic payroll
  deduction agreement. Such agreement shall set forth the amount of  prior
  service  being  purchased,  the  estimated  total  cost  of such service
  credit, and the  number  of  payroll  periods  in  which  such  periodic
  payments  shall  be made. Such agreement shall be irrevocable, shall not
  be subject to amendment or modification in any manner, and shall  expire
  only   upon   completion   of   payroll  deductions  specified  therein.
  Notwithstanding the foregoing, any member who has entered  into  such  a
  payroll  deduction  agreement  and  who  terminates  employment prior to
  completion of the payments required therein shall be credited  with  any
  service  as  to  which  such  member  shall  have paid the contributions
  required under the terms of such agreement.

    * NB Effective until notice of ruling by Internal Revenue Service  per
  ch. 627/2007 §22
    * g. Notwithstanding any other provision of law, any member of the New
  York  city  teachers'  retirement system eligible to purchase credit for
  prior service with a public employer pursuant to this section or  credit
  for  military  service  pursuant to article twenty of the retirement and
  social security law, may elect to purchase any or all of such service by
  executing a periodic payroll deduction agreement. Such  agreement  shall
  set  forth  the  amount  of  prior  service  or  military  service being
  purchased, the estimated total cost of  such  service  credit,  and  the
  number of payroll periods in which such periodic payments shall be made.
  Such  agreement  shall be irrevocable, shall not be subject to amendment
  or modification in any manner, and shall expire only upon completion  of
  payroll deductions specified therein. Notwithstanding the foregoing, any
  member  who  has entered into such a payroll deduction agreement and who
  terminates employment prior  to  completion  of  the  payments  required
  therein shall be credited with any service as to which such member shall
  have paid the contributions required under the terms of such agreement.
    * NB  Takes  effect  upon notice of ruling by Internal Revenue Service
  per ch. 627/2007 §22 -- expires per ch. 691/2004 §8