ยง 57. Continuous  recruitment  for  certain positions. Notwithstanding
  any other provisions of this chapter or any other law, the civil service
  department or a municipal commission may establish a continuing eligible
  list  for  any  class  of  positions  for  which  it  finds  such  lists
  appropriate.  The civil service department may only establish continuing
  eligible  lists  for  any  class  of  positions  filled   through   open
  competitive  examination.  Names  of eligibles shall be inserted in such
  list from time to time as applicants are tested and found  qualified  in
  examinations  held  at  such intervals as may be prescribed by the civil
  service department or municipal  commission  having  jurisdiction.  Such
  successive examinations shall, so far as practicable, be constructed and
  rated  so  as  to  be  equivalent  tests  of  the  merit  and fitness of
  candidates. The name of any candidate who passes  any  such  examination
  and  who  is  otherwise  qualified  shall  be  placed  on the continuing
  eligible list in the rank corresponding to his or her  final  rating  on
  such examination. The period of eligibility of successful candidates for
  certification  and  appointment from such continuing eligible list, as a
  result of any such examination, shall be  fixed  by  the  civil  service
  department  or  municipal  commission but, except as a list may reach an
  announced terminal date, such period shall not be less  than  one  year;
  nor  shall such period of eligibility exceed four years. Subject to such
  conditions and limitations as the civil service department or  municipal
  commission  may  prescribe,  a  candidate  may  take  more than one such
  examination;  provided,  however,  that  no  such  candidate  shall   be
  certified  simultaneously  with  more  than  one  rank on the continuing
  eligible list. With respect to any candidate  who  applies  for  and  is
  granted  additional  credit  in  any  such  examination as a disabled or
  non-disabled veteran, and for  the  limited  purpose  of  granting  such
  additional  credit,  the eligible list shall be deemed to be established
  on the date on which his or her name is added thereto.
Structure New York Laws
Article 4 - Recruitment of Personnel
Title A - Examinations and Eligible Lists
50-A - Test Validation Boards.
50-C - Discrimination Based Upon History of Cancerous Condition Prohibited.
51 - Filling Vacancies by Open Competitive Examination.
55 - Examination of Blind or Physically Handicapped Applicants.
55-A - Employment of Persons With Disabilities by Municipalities.
55-B - Employment of Persons With Disabilities by the State.
55-C - Employment of Veterans With Disabilities by the State.
55-C*2 - Acceptability of Certain High School Diplomas.
56 - Establishment and Duration of Eligible Lists.
57 - Continuous Recruitment for Certain Positions.
58 - Requirements for Provisional or Permanent Appointment of Certain Police Officers.
58-A - Requirements for Provisional or Permanent Appointment of Certain Fire Fighters.
59 - Placement of County Sheriffs' Personnel in Classified Service.
59-A - Placement of Detectives and Investigators in Classified Service.
59-B - Promotions of Supervisory Personnel of the Emergency Medical Service.
59-C - State Employment of Persons and Veterans With Disabilities Study.