ยง 511-a.   Special  service retirement.   1. Retirement upon a special
  service  retirement  allowance  shall  be  made  under   the   following
  conditions:  Any  member,  by written notice duly acknowledged and filed
  with the retirement board before the first day of July, nineteen hundred
  sixty-seven, or  within  two  years  after  he  last  became  a  member,
  whichever  is later, may elect to contribute pursuant to this section on
  the basis of retirement at an age within five years of the age  when  he
  would  be  eligible  for  superannuation  retirement  as  provided under
  subdivision one  of  section  five  hundred  ten,  but  not  before  age
  fifty-five.  After such election the rate of deduction from the earnable
  compensation of the contributor shall be six and one-half per centum  if
  his  normal  rate as provided under section five hundred sixteen is four
  per centum, and shall be eight per centum if such normal  rate  is  five
  per  centum.  Where  a  member  elects  to  contribute  pursuant to this
  section, contributions at such higher rate shall be made from the  first
  day  of  July,  nineteen  hundred  sixty-seven, or from the first of the
  month following the expiration of thirty days subsequent to  the  filing
  of  his election, whichever is later. If, at the time of retirement, the
  member's  accumulated  contributions  are  insufficient  to  provide  an
  annuity  equal  to the pension provided under paragraph b of subdivision
  four of this section, he shall have the privilege  of  paying  into  the
  retirement system by a single payment the amount required in addition to
  his  accumulated  contributions  to  provide  an  annuity  equal to said
  pension.
2. One year or more after the filing thereof, a  member  may  withdraw
  his  election  to  contribute  pursuant  to this section on the basis of
  special service retirement. Such withdrawal shall be by  written  notice
  duly  acknowledged  and  filed  with  the  retirement board. Such member
  thereafter  shall  contribute  on  the  basis  of  his  rate  of  normal
  contribution.  Such  member,  upon  application  at  any  time  prior to
  retirement and with the approval  of  the  retirement  board,  shall  be
  entitled  to  a  refund  of  the amount of his contributions and regular
  interest thereon, which is in excess of the amount  of  the  accumulated
  contributions  which  he  would  then  have  to  his  credit had he been
  contributing on the basis of his rate of normal contribution.
3. Any  member  electing  to  contribute  towards  a  special  service
  retirement  allowance  under  the  provisions  of  this section, who has
  attained age fifty-five or over while in service, shall be  eligible  to
  retire  at  any  time  within  five  years  before  the date he would be
  eligible for superannuation retirement as provided under subdivision one
  of section five hundred ten, if he files with  the  retirement  board  a
  statement  duly attested setting forth at what time not less than thirty
  days nor more than ninety days subsequent to the  execution  and  filing
  thereof he desires such retirement.
4.  Upon  special service retirement, a member shall receive a special
  service retirement allowance which shall consist of:
a.  An  annuity  which  shall  be  the  actuarial  equivalent  of  his
  accumulated contributions at the time of his retirement, and
b.  A  pension  of  one  quarter of his final average salary or if his
  total  service  is  less  than  twenty-five  years,  a  pension  of  one
  one-hundredth  of  his  final average salary multiplied by the number of
  years of total service, and
c. If the member be a  present  teacher,  a  further  pension  of  one
  one-hundred  fortieth  of  his  final  average  salary multiplied by the
  number of  years  of  total  service  certified  on  his  prior  service
  certificate, and
d.   If  the  member  has  contributed  pursuant  to  paragraph  c  of
  subdivision three of section five hundred sixteen, a further pension  of
  one one-hundred twentieth (1/120) of his final average salary multiplied
  by  the  number of years of total service in excess of twenty-five years
  but not in excess of thirty-five years, nor in excess of the  number  of
  years for which credit is allowed under paragraph d of subdivision three
  of section five hundred sixteen.
Structure New York Laws
Article 11 - State Teachers' Retirement System for Public School Teachers
504 - Retirement Board; Members; Terms of Office; Vacancies.
505 - Election of the Active Teacher Members of the Board.
505-A - Election of Retired Teacher Member of Board.
506 - Board Meetings; Oaths of Office; Quorum; Expenses.
507 - Officers of Board; Custody of Funds.
508 - Investment of Funds; Interest; Accounts; Reports.
509 - Statements of Teachers' Service; Determination of Service Creditable; Service Certificates.
510 - Superannuation Retirement.
511-A - Special Service Retirement.
512 - Withdrawal and Death Benefits.
514 - Benefits to Participants in Old Retirement Fund.
516 - Annuity Savings Fund; Contributions and Payments.
517 - Annuity Reserve Fund; Pension Accumulation Fund.
518-A - Supplemental Retirement Allowance Fund.
521 - Collection of Contributions.
522 - Transfer of Contributions Between Retirement Systems.
524 - Exemption From Taxation and Execution.
525 - Protection Against Fraud.
526 - Merger of Local Teachers' Retirement and Pension Systems With the State System.
528 - Pensions-Providing-for-Increased-Take-Home-Pay.
529 - Pensions Providing for Increased Take Home Pay for Certain Teachers.
530 - Pensions-Providing-for-Increased-Take-Home-Pay-for-Teachers.
532 - Supplemental Retirement Allowance.
532-A - Cost-of-Living Adjustment.
533 - Non-Contributory Retirement Plan.
536 - Deductions From Benefits of Certain Retired Members.
537 - Lump Sum Payment of De Minimis Service Retirement Benefit.