(a) the term "protected  class"  includes  age,  race,  creed,  color,
national  origin,  sexual  orientation,  gender  identity or expression,
military status, sex, disability, predisposing genetic  characteristics,
familial status, marital status, or domestic violence victim status, and
any  employee  protected from discrimination pursuant to paragraphs (a),
(b), and (c) of subdivision one of section two hundred ninety-six of the
executive law, and any intern protected from discrimination pursuant  to
section two hundred ninety-six-c of the executive law.
  (b)  the  term "compensation" shall include but not be limited to: all
earnings of an employee for labor or services  rendered,  regardless  of
whether  the  amount  of  earnings  is paid on an annual salary, hourly,
biweekly or per diem basis; reimbursement for expenses; health,  welfare
and  retirement  benefits;  and  vacation  pay,  sick pay, separation or
holiday pay, or any other form of remuneration.
  (c) employees shall be deemed to work in the same establishment if the
employees work for the same employer at workplaces located in  the  same
geographical  region,  no  larger  than  a  county,  taking into account
population distribution,  economic  activity,  and/or  the  presence  of
municipalities.
  (d)  the term "public authorities" shall mean any authority as defined
in section two of this title.
  3. (a) It shall not be a violation of this section for an employer  to
pay  different  compensation  to employees, where such payments are made
pursuant to:
  (1) a bona fide seniority or merit system;
  (2) a bona fide system that measures earnings by quantity  or  quality
of production;
  (3) a bona fide system based on geographic differentials;
  (4)  any  other  bona fide factor other than status within one or more
protected class or classes, such as education, training, or  experience.
Such  factor: (A) shall not be based upon or derived from a differential
in compensation based on status within one or more  protected  class  or
classes;  and  (B)  shall be job-related with respect to the position in
question and shall be consistent with business necessity. Such exception
under this paragraph shall not apply when the employee demonstrates  (i)
that  an  employer  uses  a particular employment practice that causes a
disparate impact on the basis of status within  one  or  more  protected
class  or  classes,  (ii) that an alternative employment practice exists
that would serve the same purpose and not produce such differential, and
(iii) that the employer has refused to adopt such alternative  practice;
or
  (5) a collective bargaining agreement.
  (b)  For  the  purpose of paragraph (a) of this subdivision, "business
necessity"  shall  be  defined  as  a  factor  that  bears  a   manifest
relationship to the employment in question.
  (c)  Nothing  set  forth in this section shall be construed to impede,
infringe or diminish the rights and benefits which accrue  to  employees
through  collective  bargaining  agreements,  or  otherwise diminish the
integrity of the existing collective bargaining relationship.