Section 911. Benefit enhancements

a. 1. An eligible member other than a
  member of the New York city teachers' retirement system (i) with a  date
  of  membership  in  a  retirement  system  prior to July twenty-seventh,
  nineteen hundred seventy-six and (ii) who was in active service on  June
  first, two thousand and continued in active service until October first,
  two  thousand,  shall  receive  one-twelfth  of  a  year  of  additional
  retirement credit  for  each  year  of  retirement  credit  for  service
  rendered  as  of  the date of retirement, vesting, transfer or death, if
  applicable, up to a maximum of two  years  of  retirement  credit.  Such
  additional  credit  shall  be  available  for  all  purposes,  including
  fulfilling the qualifying service requirements of  Plans  A  and  C,  if
  applicable.
    2.  An  eligible member who is a member of the New York city teachers'
  retirement  system  (i)  with  a  date  of  membership  prior  to   July
  twenty-seventh,  nineteen hundred seventy-six and (ii) who was in active
  service on October first, two  thousand  and  (A)  continued  in  active
  service  up  to  and  including  June thirtieth, two thousand one, shall
  receive one-twelfth of a year of additional retirement credit  for  each
  year  of  retirement  credit  for  service  rendered  as  of the date of
  retirement, vesting, transfer or death, if applicable, up to  a  maximum
  of  one  year of retirement credit or (B) continued in active service up
  to and  including  June  thirtieth,  two  thousand  two,  shall  receive
  one-twelfth  of  a year of additional retirement credit for each year of
  retirement credit for service rendered as of  the  date  of  retirement,
  vesting,  transfer or death, if applicable, up to a maximum of two years
  of retirement credit. No eligible member shall  receive  more  than  two
  years  of  retirement  credit  pursuant to this section. Such additional
  credit shall be available for all  purposes,  including  fulfilling  the
  qualifying service requirements of Plan A or C, if applicable.
    3.  Notwithstanding  any  other  provisions  of  law,  if  the service
  retirement benefit of  an  eligible  member  is  subject  to  a  maximum
  retirement  benefit,  including  any  limitation imposed by section four
  hundred forty-four of this chapter, the additional benefit authorized by
  this subdivision shall be computed by multiplying the pensionable salary
  base times the number  of  years  of  service  credit  granted  by  this
  subdivision  times  the  benefit  fraction  of  the plan under which the
  employee retires.
    b. 1. An eligible member (i) with a date of membership in a retirement
  system on or after July twenty-seventh, nineteen hundred seventy-six and
  (ii) who has ten or more years of membership or ten  or  more  years  of
  credited  service  with  a  retirement  system  under  the provisions of
  article fourteen or fifteen of this chapter shall  not  be  required  to
  contribute  to  a  retirement  system  pursuant  to section five hundred
  seventeen or six hundred thirteen of this chapter as  of  the  cessation
  date.
    2.  No  contribution made to a retirement system by an eligible member
  prior to the eligible member's cessation date shall be refunded,  except
  as  otherwise  allowable pursuant to article fourteen or fifteen of this
  chapter.
    3. Nothing in this subdivision b shall affect  the  obligation  of  an
  eligible  member to repay any contributions previously refunded pursuant
  to article fourteen, fifteen or fifteen-D of this chapter in  the  event
  such  person  rejoins  a  retirement system. Nothing in this subdivision
  shall affect the obligation of an eligible member to pay such amounts as
  may be required by section five hundred seventeen, six hundred  nine  or
  six  hundred  thirteen  of this chapter or by any other provision of law
  for service rendered prior to such member's date of membership at a time
  such member was not a member of a retirement system.