Section 90. Payment of overtime compensation to public officers or employees

The governing board of each municipal corporation  or  other  civil  division or political subdivision of the state, or in the city of
  New York, the mayor, by ordinance, local law, resolution, order or rule,
  may provide for the payment of  overtime  compensation  to  any  or  all
  public  officers  except  elective officers and those officers otherwise
  excluded by  law  and  to  any  or  all  public  employees  under  their
  jurisdiction at the regular basic pay rate of such officers or employees
  for  all  time such officers or employees are required to work in excess
  of their regularly established hours of employment or at such other rate
  as such governing board, or in the city of  New  York,  the  mayor,  may
  authorize.  The  amounts  received  as  overtime compensation under this
  section shall be regarded as salary  or  compensation  for  any  of  the
  purposes  of  any  pension  or retirement system of which the officer or
  employee receiving the same is  a  member.  Such  overtime  compensation
  shall  not  be  regarded  as  salary  or compensation for the purpose of
  determining the right to any increase of salary or any salary  increment
  on  account  of  length  of  service  or  otherwise.  No  such  overtime
  compensation shall be construed to constitute a promotion.